CN105355926B - Air cathode, air cathode preparation method and microbiological fuel cell - Google Patents
Air cathode, air cathode preparation method and microbiological fuel cell Download PDFInfo
- Publication number
- CN105355926B CN105355926B CN201510728798.6A CN201510728798A CN105355926B CN 105355926 B CN105355926 B CN 105355926B CN 201510728798 A CN201510728798 A CN 201510728798A CN 105355926 B CN105355926 B CN 105355926B
- Authority
- CN
- China
- Prior art keywords
- layer
- air cathode
- catalyst layer
- reaction compartment
- current collection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims description 46
- 230000002906 microbiologic effect Effects 0.000 title claims description 36
- 238000002360 preparation method Methods 0.000 title abstract description 19
- 239000003054 catalyst Substances 0.000 claims abstract description 130
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000009792 diffusion process Methods 0.000 claims abstract description 72
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 54
- 239000011230 binding agent Substances 0.000 claims abstract description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 82
- 238000006243 chemical reaction Methods 0.000 claims description 71
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 60
- 238000000034 method Methods 0.000 claims description 41
- 229910052759 nickel Inorganic materials 0.000 claims description 41
- 239000000758 substrate Substances 0.000 claims description 38
- 239000011261 inert gas Substances 0.000 claims description 30
- 239000012705 liquid precursor Substances 0.000 claims description 22
- 239000001257 hydrogen Substances 0.000 claims description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims description 18
- 239000006229 carbon black Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 244000005700 microbiome Species 0.000 claims description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 13
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 12
- 239000010453 quartz Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000012736 aqueous medium Substances 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 7
- 229910001868 water Inorganic materials 0.000 claims description 7
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 6
- 150000003233 pyrroles Chemical class 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- -1 graphite Alkene Chemical class 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 239000012295 chemical reaction liquid Substances 0.000 claims 1
- 239000002243 precursor Substances 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 abstract description 22
- 239000010410 layer Substances 0.000 description 256
- 229910052799 carbon Inorganic materials 0.000 description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 22
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 21
- 239000004810 polytetrafluoroethylene Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 15
- 239000004744 fabric Substances 0.000 description 15
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 239000010865 sewage Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- DSVGQVZAZSZEEX-UHFFFAOYSA-N [C].[Pt] Chemical compound [C].[Pt] DSVGQVZAZSZEEX-UHFFFAOYSA-N 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 7
- 229910052786 argon Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910052697 platinum Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000000137 annealing Methods 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical group Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000011081 inoculation Methods 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000008363 phosphate buffer Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 238000007605 air drying Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000008055 phosphate buffer solution Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 235000019195 vitamin supplement Nutrition 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 206010011224 Cough Diseases 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical class CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 1
- 229920000557 Nafion® Polymers 0.000 description 1
- PLZNPHDJGFDNRM-UHFFFAOYSA-M O.[Na+].[O-][PH2]=O Chemical compound O.[Na+].[O-][PH2]=O PLZNPHDJGFDNRM-UHFFFAOYSA-M 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 150000001336 alkenes Chemical group 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- DLGYNVMUCSTYDQ-UHFFFAOYSA-N azane;pyridine Chemical compound N.C1=CC=NC=C1 DLGYNVMUCSTYDQ-UHFFFAOYSA-N 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 229940075397 calomel Drugs 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910000397 disodium phosphate Inorganic materials 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002305 electric material Substances 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004502 linear sweep voltammetry Methods 0.000 description 1
- 238000009630 liquid culture Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000009629 microbiological culture Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/8605—Porous electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inert Electrodes (AREA)
- Catalysts (AREA)
Abstract
The present invention proposes a kind of air cathode.The air cathode includes：Catalyst layer, the catalyst layer contains nitrogen-doped graphene；And diffusion layer.Thus, the catalyst layer with good catalytic can be provided for the air cathode by nitrogen-doped graphene, and the air cathode preparation process is easy, catalyst layer need not add binding agent and carry out rubbing molded, and then can improve the electrode performance of the air cathode.
Description
Technical field
The present invention relates to environment, material, energy field, in particular it relates to air cathode, prepare air cathode
The purposes of method, microbiological fuel cell and microbiological fuel cell in processing aqueous medium.
Background technology
Environmental problem and two hang-ups that energy problem is that contemporary society's development faces, the energy is taken into account while purification sewage
Recovery is the new challenge that sewage disposal technology is faced.Microbiological fuel cell is a kind of emerging sewage disposal technology, Neng Gou
The chemical energy in pollutant is converted into electric energy while processing sewage, using being attached to the electricity-producing microorganism of anode by sewage
Oxidation operation, while negative electrode receive electronics complete oxygen reduction reaction.In the negative electrode of microbiological fuel cell, air cathode
Due to the direct diffusion of oxygen, mass transfer in air can be realized, and save substantial amounts of aeration energy consumption and receive extensive concern.
However, the catalytic efficiency of air cathode and microbiological fuel cell currently used for microbiological fuel cell and
Battery performance still has much room for improvement.
The content of the invention
The application is that discovery based on inventor to following facts and problem and understanding are made：
In current air cathode, the problem of generally existing preparation process is complicated, it usually needs carry out electrode material many
It is secondary to rub the operation such as pressure or brushing to be molded it.And because preparation process is complicated, usually required when preparing catalyst layer
Larger catalyst material load capacity, so as to meet demand and air cathode in the preparation process of air cathode in itself for
The requirement of catalytic performance.Inventor has found that this is due to the material for constituting catalyst layer by further investigation and many experiments
It is dusty material mostly, it is therefore desirable to series of formed processing is carried out to it in the process for preparing air cathode, will can be somebody's turn to do
Dusty material is compound in air cathode.In addition, needing addition binding agent during catalyst layer is prepared to strengthen
The contact of catalyst layer material, and forming processes can be carried out better by the methods such as pressure, vertical compression, brushing are rubbed.However, on
The insulator that binder material is usually electronics is stated, therefore the addition of binding agent also can cause one to the electric conductivity of air cathode
It is fixing to ring.
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
In the first aspect of the present invention, the present invention proposes a kind of air cathode.Embodiments in accordance with the present invention, the air
Negative electrode includes：Catalyst layer, catalyst layer described in the catalyst layer contains nitrogen-doped graphene；And diffusion layer.Thus, may be used
To provide the catalyst layer with good catalytic, and the air preparation process as the air cathode by nitrogen-doped graphene
Simplicity, catalyst layer need not add binding agent and carry out rubbing molded, and then can improve the electrode performance of the air cathode.
Embodiments in accordance with the present invention, the air cathode can also further have following additional technical feature at least it
One：
Embodiments in accordance with the present invention, the air cathode further comprises：Current collection layer, wherein, the current collection layer is by not
Become rusty steel formation, the current collection layer is arranged between the diffusion layer and the catalyst layer, or the catalyst layer with
And the diffusion layer is arranged on the same side of the current collection layer.Thus, it is possible to strengthen the conduction of the air cathode by current collection layer
Performance, and then further improve the performance of the air cathode.
Embodiments in accordance with the present invention, the air cathode further comprises：Supporting layer, the supporting layer is arranged on the expansion
Dissipate between layer and the catalyst layer, the supporting layer is formed by stainless steel.Thus, it is possible to be provided for the air cathode
Reliable support.
Embodiments in accordance with the present invention, the catalyst layer formation is in the side of the current collection layer, and the supporting layer is formed
In side of the catalyst layer away from the current collection layer, the diffusion layer formation is in the supporting layer away from the catalyst layer
Side.Thus, it is possible to be that catalyst layer and diffusion layer provide good support and protection by current collection layer and supporting layer,
The electrode conductivuty of the air cathode is improved simultaneously, and then can further improve the electrode performance of the air cathode.
In embodiments in accordance with the present invention, the air cathode, binding agent is free of in the catalyst layer.Thus, it is possible to carry
The electric conductivity of high catalyst layer, and then further improve the electrode performance of the air cathode.
Embodiments in accordance with the present invention, in the air cathode, in the catalyst layer, the nitrogen-doped graphene it is negative
Carrying capacity is not more than 2.5 μ g/cm2.Inventor's discovery, can be in catalyst layer in air cathode according to embodiments of the present invention
Preferable catalytic effect is reached on the premise of catalytic active component content is less, so that, save being produced into for the air cathode
This, and ensure that the electrode performance of the air cathode is unaffected.
Embodiments in accordance with the present invention, the catalyst layer, which includes the catalyst layer, includes metallic substrates and the nitrogen
Doped graphene, the nitrogen-doped graphene is supported in the metallic substrates.Thus, it is possible to which nitrogen-doped graphene will be contained
Metallic substrates avoid the forming operation of complexity directly as catalyst layer, and due to containing gold in the catalyst layer
Belong to substrate, and then further increase the electric conductivity of catalyst layer, and then can further improve the electrode of the air cathode
Performance.
In embodiments in accordance with the present invention, the air cathode, the catalyst layer is formed through the following steps：It will contain
The quartz boat for having the metallic substrates is placed in closed reaction compartment, wherein, the metallic substrates include nickel screen and foam
At least one of nickel；Under 250~300 degrees Celsius, inert gas is passed through into the reaction compartment, to discharge the reaction
Air in space；Temperature in the reaction compartment is increased to 800~1200 degrees Celsius, while into the reaction compartment
It is passed through hydrogen, the flow-rate ratio of the hydrogen and the inert gas is 1:40~1:1000；And supplied into the reaction compartment
To liquid precursor, the liquid precursor is included selected from least one of acetonitrile, pyridine and pyrroles, the liquid precursor
Flow velocity be 2~1000 μ l/min, the service time of the liquid precursor is 2~60 minutes, so as in the metallic substrates
The upper load nitrogen-doped graphene, and then obtain the catalyst layer.Mixed thus, it is possible to easily obtain the nitrogen with nickel screen
Miscellaneous graphene, and then can further improve the electrode performance of the air cathode.
In another aspect of this invention, the present invention proposes a kind of method for preparing air cathode.According to the reality of the present invention
Example is applied, this method includes：(1) nitrogen-doped graphene is loaded on the metallic substrate, to obtain catalyst layer；And (2) are in institute
The side for stating catalyst layer sets diffusion layer, to obtain the air cathode.Thus, it is possible to improve sky is prepared using this method
The efficiency and effect of gas negative electrode.
Embodiments in accordance with the present invention, this method can also further have at least one following additional technical feature：
Embodiments in accordance with the present invention, the catalyst layer through the following steps that formed：The Metal Substrate will be contained
The quartz boat at bottom is placed in closed reaction compartment, wherein, the metallic substrates include at least one of nickel screen and nickel foam；
Under 250~300 degrees Celsius, inert gas is passed through into the reaction compartment, to discharge the air in the reaction compartment；
Temperature in the reaction compartment is increased to 800~1200 degrees Celsius, while hydrogen is passed through into the reaction compartment, it is described
The flow-rate ratio of hydrogen and the inert gas is 1:40~1:1000；And liquid precursor is supplied into the reaction compartment,
The liquid precursor at least one of includes selected from acetonitrile, pyridine and pyrroles, the flow velocity of the liquid precursor for 2~
1000 μ l/min, the service time of the liquid precursor is 2~60 minutes, to load the nitrogen in the metallic substrates
Doped graphene, and then the catalyst layer, the diffusion layer are obtained through the following steps that being formed：It is 2 to take mass ratio:3
Carbon black and teflon mixture, add ethanol and in 80 C water baths ultrasound 10~30 minutes it is sticky to being formed
Shape mixture；The mixture of viscous form is subjected to forming processes, to obtain the diffusion layer.Thus, it is possible to improve utilization
This method prepares the efficiency and effect of air cathode.
Embodiments in accordance with the present invention, before the diffusion layer is set, pre-set current collection layer, the current collection layer be by
Stainless steel formation, wherein, the current collection layer is arranged between the diffusion layer and the catalyst layer, or the catalysis
Oxidant layer and the diffusion layer are arranged on the same side of the current collection layer.Prepared thus, it is possible to further improve using this method
Air cathode efficiency and effect.
Embodiments in accordance with the present invention, this method further comprises：Supporting layer is set, and the supporting layer is arranged on the expansion
Dissipate between layer and the catalyst layer, the supporting layer is formed by stainless steel.It is somebody's turn to do thus, it is possible to further improve to utilize
The efficiency and effect of air cathode prepared by method.
In still another aspect of the invention, the present invention proposes a kind of microbiological fuel cell.Embodiments in accordance with the present invention,
The microbiological fuel cell includes：Reaction compartment is limited in housing, the housing；Anode, the anode is arranged on described anti-
Answer in space；Electricity-producing microorganism, the electricity-producing microorganism is attached to the outer surface of the anode；And foregoing air is cloudy
Pole, the air cathode is arranged in the reaction compartment, and the air cathode is electrically connected with the anode.Thus, may be used
To improve the using effect by the use of the air cathode as the microbiological fuel cell of cell cathode.
In still another aspect of the invention, the present invention proposes previously described microbiological fuel cell in processing aqueous medium
In purposes.Thus, it is possible to handle the aqueous medium such as sewage using microorganism fuel cell, and then dirt can be improved
The efficiency and effect of water process.
Brief description of the drawings
Fig. 1 shows the structural representation of air cathode according to an embodiment of the invention；
Fig. 2 shows the structural representation of air cathode in accordance with another embodiment of the present invention；
Fig. 3 shows the structural representation of the air cathode according to another embodiment of the invention；
Fig. 4 shows the structural representation of the air cathode according to another embodiment of the invention；
Fig. 5 shows the structural representation of microbiological fuel cell according to an embodiment of the invention；
Fig. 6 shows the electron scanning micrograph of catalyst layer according to embodiments of the present invention；
Fig. 7 shows the electron scanning micrograph of catalyst layer according to embodiments of the present invention；
Fig. 8 shows the Raman spectrogram and analysis chart of nitrogen-doped graphene according to embodiments of the present invention；
Fig. 9 shows x-ray photoelectron power spectrum (XPS) test of nitrogen-doped graphene according to an embodiment of the invention
Result figure；
Figure 10 shows air cathode electrochemistry linear scanning volt-ampere curve according to embodiments of the present invention；
Figure 11 shows microbiological fuel cell current density-surface power density curve map according to embodiments of the present invention；
Figure 12 shows microbiological fuel cell current density-cathode potential curve figure according to embodiments of the present invention；
Figure 13 shows microorganism fuel cell cathode internal resistance block diagram according to embodiments of the present invention；
Reference：
10：Catalyst layer
20：Diffusion layer
30：Current collection layer
40：Supporting layer
100：Housing
200：Anode
300：Negative electrode
400：Electricity-producing microorganism
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings.Below with reference to
The embodiment of accompanying drawing description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
In one aspect of the invention, the present invention proposes a kind of air cathode.Below to the specific knot of the air cathode
Structure is described in detail.With reference to Fig. 1, embodiments in accordance with the present invention, the air cathode includes：Catalyst layer 10 and diffusion layer
20.Specifically, catalyst layer 10 is to include nitrogen-doped graphene, to improve the catalytic effect of catalyst layer 10；Diffusion layer 20
For promoting the transmission of oxygen and preventing aqueous water from being overflowed from air cathode.Specifically, embodiments in accordance with the present invention, should
The diffusion layer 20 of air cathode is in contact (not shown) with air, so as to which the oxygen in air is delivered into air cathode
In, and occur reduction reaction using the catalytic oxygen of catalyst layer 10, and then realize the use function of the air cathode.Thus, may be used
To provide the catalyst layer with good catalytic, and the air preparation process as the air cathode by nitrogen-doped graphene
Simplicity, catalyst layer need not add binding agent and carry out rubbing molded, and then can improve the electrode performance of the air cathode.
Embodiments in accordance with the present invention, catalyst layer 10 can include metallic substrates and nitrogen-doped graphene, wherein nitrogen
Doped graphene is loaded on the metallic substrate.For example, embodiments in accordance with the present invention, the metallic substrates can be nickel screen or bubble
Foam nickel.Thus, it is possible to be used using the nickel screen containing nitrogen-doped graphene directly as catalyst layer 10, nitrogen-doped graphene is made
Can occur reduction reaction with catalytic oxygen for the material with catalytic activity, and metallic substrates are due to preferable conductive energy
Power, and good chemical stability, therefore can further improve the electric conductivity of the air cathode.Thus, it is possible to avoid
During catalyst layer 10 is prepared required for it is a series of rub molded operation, directly can will contain nitrogen-doped graphene
Metallic substrates be cut into the size and shape of needs, the other parts composite molding with air cathode.Thus, it is possible to enter one
Step simplifies the technique for preparing the air cathode.
In addition, embodiments in accordance with the present invention, in the catalyst layer 10 of the air cathode, the load of nitrogen-doped graphene
Amount is not more than 2.5 μ g/cm2(being converted according to negative electrode projected area).In current air cathode, the load capacity of catalyst layer is general
For not less than 3mg/cm2, in air cathode according to embodiments of the present invention, the load capacity of catalyst with current air cathode
The load capacity of catalyst is compared to 3 orders of magnitude are reduced, while air cathode proposed by the present invention can also obtain preferable work(
Rate density.Inventor has found, in air cathode according to embodiments of the present invention, can contain in catalyst layer catalytic active component
Preferable catalytic effect is reached on the premise of amount is less, and then saves the production cost of the air cathode, and ensure that the sky
The electrode performance of gas negative electrode is unaffected.In addition, embodiments in accordance with the present invention, bonding is not contained in the catalyst layer 10
Agent.Due to catalyst layer 10 by nitrogen-doped graphene load formed on the metallic substrate, therefore with traditional powdered material
Material is compared, it is not necessary to which binding agent is added during catalyst layer 10 is prepared makes catalytically-active materials be molded or utilize bonding
Agent is bonded the other parts of catalyst layer 10 and air cathode, can will contain N doping directly according to the actual requirements
The metallic substrates of graphene are cut into corresponding shape, and the other parts directly as catalyst layer 10 and the air cathode are carried out
With reference to.Thus, it is possible to such as polytetrafluoroethylene (PTFE) binding agent is avoided for the influence of the conductive capability of catalyst layer 10, and can letter
Change the preparation technology of catalyst layer 10, and then the electrode performance and using effect of the air cathode can be improved.
In addition, embodiments in accordance with the present invention, with reference to Fig. 2, the air cathode can also further have current collection layer 30.Root
According to embodiments of the invention, what current collection layer 30 can be formed by stainless steel, for example, current collection layer 30 can be the stainless steel of 50 mesh
Net.Thus, it is possible to the current collection layer 30 being made up of stainless steel improves the current collection layer with good conductive ability for the air cathode,
And then can further improve the conductive capability of the air cathode.It should be noted that current collection layer 30, catalyst layer 10 and expansion
The specific relative position for dissipating layer 20 is not particularly limited, as long as above layers can be made to play respective function, and can be realized
The electrode function of the air cathode.For example, embodiments in accordance with the present invention, the air cathode can have following structure：
Diffusion layer 20 is in contact (not shown) with air, and current collection layer 30 is formed in side of the diffusion layer 20 away from air, catalyst
Layer 10 formed in side of the current collection layer 30 away from diffusion layer 20, and with electrolyte contacts (not shown).Or, according to this hair
Bright embodiment, with reference to Fig. 3, in the air cathode, diffusion layer 20 is in contact (not shown), catalyst layer 10 with air
Formed in side (not shown) of the diffusion layer 20 away from air, current collection layer 30 is formed in catalyst layer 10 away from diffusion layer 20
Side, and with electrolyte contacts (not shown).Further, it is also possible to make current collection layer 30 be in contact with air, in current collection layer
30 side forms diffusion layer 20, and catalyst layer 10 is formed in side of the diffusion layer 20 away from current collection layer 30.Due to current collection layer 30
It can be formed by stainless (steel) wire, therefore current collection layer 30 can also realize that diffusion layer 20 promotes oxygen transmission with air contact
Function.Thus, those skilled in the art can select appropriate structure to constitute according to embodiments of the present invention according to the actual requirements
Air cathode, and then the using effect of the air cathode can be improved.
In addition, the using effect in order to further improve the air cathode, the air cathode can also further have branch
Support layer.Embodiments in accordance with the present invention, with reference to Fig. 4, supporting layer 40 is formed between catalyst layer 10 and diffusion layer 20, and is propped up
Support layer 40 can be formed by stainless steel.In order to simplify the preparation process of the air cathode, supporting layer 40 can be selected and current collection layer
30 have 40 mesh stainless (steel) wire of the same area.Thus, it is possible to provide better by supporting layer 40 for the air cathode
Supporting construction, and supporting layer 40 is located at the both sides of catalyst layer 10 with current collection layer 30 respectively, and then can be catalyst layer 10
Good protection is provided.In addition, the supporting layer 40 being made up of stainless (steel) wire can also further improve the conduction of the air cathode
Property, and then can further improve the performance of the air cathode.It should be noted that not paying the premise of creative work
Under, protection scope of the present invention is fallen within to the improvement that air cathode according to embodiments of the present invention is made.For example, can expand
Dissipate side of the layer 20 away from supporting layer 40 and add one layer of structure being made up of stainless (steel) wire again, to strengthen leading for the air cathode
Electrical property simultaneously provides diffusion layer 20 better support.Thus, those skilled in the art can select according to the actual requirements
Appropriate air cathode structure constitutes air cathode according to embodiments of the present invention.
Embodiments in accordance with the present invention, catalyst layer 10 can be obtained through the following steps：
Nitrogen-doped graphene is loaded on the metallic substrate, to obtain catalyst layer 10.It should be noted that metallic substrates
Concrete composition and shape be not particularly limited, as long as nitrogen-doped graphene can be supported in the metallic substrates, and directly
Connect and be applied to as catalyst layer in air cathode.For example, nickel screen or nickel foam can be selected as metallic substrates.Tool
Body, according to one embodiment of present invention, the quartz boat containing nickel screen can be placed in closed reaction compartment, 250
Under~300 degrees Celsius, inert gas is passed through into reaction compartment, to discharge the air in the reaction compartment.Need explanation
, the describing mode " under 250~300 degrees Celsius, inert gas is passed through into reaction compartment " used herein should
Be interpreted broadly, reaction compartment is heated and be passed through into reaction compartment inert gas be can synchronously, successively or
Every progress, you can so that reaction compartment is carried out into the temperature that heating reaches predetermined temperature, i.e., 250~300 degree Celsius first, then
Inert gas is passed through into reaction compartment, can also led to during being heated to reaction compartment into the reaction compartment
Enter inert gas, inert gas can also be passed through in reaction compartment first, then reaction compartment heated again, as long as most
Realize eventually at a temperature of 250~300 degrees Celsius, there is inert gas in reaction compartment.
Embodiments in accordance with the present invention, the particular type of inert gas is not particularly limited, and those skilled in the art can be with
Appropriate inert gas is selected according to actual needs, as long as the gas does not occur with any material in reaction compartment at high temperature
Chemical reaction.For example, embodiments in accordance with the present invention, argon gas or nitrogen can be selected as inert gas, so as to for
Inert atmosphere is provided in reaction compartment.Temperature in reaction compartment is increased to 800~1200 degrees Celsius, while to reaction compartment
In be passed through hydrogen, the hydrogen and the flow-rate ratio of inert gas being passed through be 1:40~1:1000.In addition, according to the implementation of the present invention
Before example, temperature arrival predetermined temperature that can also be in reaction compartment, while increasing the flow velocity of hydrogen and inert gas, enter
And the effect made annealing treatment to nickel screen surface can be reached, nickel screen surface oxide layer that may be present is reduced, entered
And the performance of the nitrogen-doped graphene of subsequent deposition can be improved.Liquid precursor is supplied into the reaction compartment.According to this
The embodiment of invention, the species of liquid precursor is not particularly limited, if can be provided for nitrogen-doped graphene carbon source and
Nitrogen source, those skilled in the art can according to the actual requirements, before selecting appropriate liquid itrogenous organic substance matter as liquid
Drive body.According to a particular embodiment of the invention, the liquid precursor can be acetonitrile, pyridine and pyrroles.According to the present invention's
One embodiment, selection acetonitrile is as liquid precursor, and the flow velocity of acetonitrile can be 2~1000 μ l/min, and service time can be with
For 2~60 minutes.Thus, it is possible to by the method for chemical vapor deposition, nitrogen-doped graphene is directly formed on nickel screen, and then
Obtain catalyst layer 10.
Embodiments in accordance with the present invention, diffusion layer 20 can be prepared by following steps：By carbon black and 60 mass % poly- four
PVF (PTFE) dispersion liquid is mixed, and the mass ratio of carbon black and 60 mass %PTFE dispersion liquids is 2:3.In carbon black and 60 mass %
Ethanol is added in the mixture of PTFE dispersion liquids to increase the viscosity of said mixture, then, in 80 degrees Celsius of water-bath
Ultrasonic mixing 10-30 minutes, so as to said mixture formation sticky mass.Finally, above-mentioned sticky mass is molded
Processing, to obtain diffusion layer 20.Specifically, embodiments in accordance with the present invention, by the sticky mass by integrating, take the photograph 80
Pressure quickly is rubbed under family name's degree, the pressure less than 0.5MPa, to make ethanol volatilize, and carbon black is tied with PTFE during pressure is rubbed
Close even closer.Then repeat above-mentioned rub and press through journey 3-5 times, to improve the resistance to compression of the diffusion layer 20 of preparation in use
Performance.Then, will by rubbing the mixture of pressure repeatedly under 80 degrees Celsius, 1.5MPa by vertical compression machine vertical compression 10 seconds, so as to
To sticky solid tabletting, diffusion layer 20 is used as using the sticky solid tabletting.It should be noted that according to embodiments of the present invention
Air cathode in, can by the sticky solid tabletting directly with previously obtained catalyst layer 10 pass through the modes such as vertical compression, will
Catalyst layer 10 is fixed with diffusion layer 20, and without adhesive bond, so as to reduce production stage, reduction is prepared into
This, reduces the consumption of binding agent, it is to avoid negative effect of the binding agent to air cathode performance.
In summary, air cathode according to embodiments of the present invention has less internal resistance, according to embodiments of the present invention
Air cathode (can be less than 2.5 μ g/cm with less catalyst layer load capacity2) in the case of, obtain preferably catalysis
Effect and power density.In addition, air cathode according to embodiments of the present invention also has following characteristics and advantage：
1) directly nitrogen-doped graphene is deposited on nickel screen using chemical vapour deposition technique, obtained nitrogen-doped graphene
Equably cover metal nickel screen and fault of construction is few, catalytic effect can be greatly improved.
2) using nickel screen as nitrogen-doped graphene supporting substrate, microbiological fuel cell neutral environment can be applied to,
High specific surface area is provided for the load of catalyst while electrical conductivity is improved, promotes microbial fuel cell air cathode
Catalytic performance.
3) oxygen can be promoted as the oxygen reduction catalyst of microbial fuel cell air cathode using nitrogen-doped graphene
The absorption of gas and the oxygen reduction reaction of electrode surface, improve air cathode catalytic activity.
4) using the air cathode configuration of binder free supported catalyst, it can significantly improve electrodes conduct performance, carry
High electron transfer efficiency, so as to lift the power output of microbiological fuel cell.
5) using the air cathode preparation technology of binder free supported catalyst, catalyst carrying method takes short, operation
Simple and Catalytic Layer is easily changed, and is adapted to large area production, is greatly simplified air cathode preparation flow, contribute to microorganism to fire
Material battery is promoted the use of.
In another aspect of this invention, the present invention proposes a kind of method for preparing air cathode.According to the reality of the present invention
Example is applied, this method includes：
(1) catalyst layer is set
Embodiments in accordance with the present invention, in this step, nitrogen-doped graphene is loaded in metallic substrates, to obtain
Catalyst layer.It should be noted that the concrete composition and shape of metallic substrates are not particularly limited, as long as can be by N doping
It is graphene-supported to be applied in the metallic substrates, and directly as catalyst layer in air cathode.For example, can select
Nickel screen or nickel foam are used as metallic substrates.Specifically, according to one embodiment of present invention, can be by the quartz containing nickel screen
Boat is placed in closed reaction compartment, under 250~300 degrees Celsius, inert gas is passed through into reaction compartment, to discharge
State the air in reaction compartment.It should be noted that used herein describing mode " under 250~300 degrees Celsius,
Inert gas is passed through into reaction compartment " it should be interpreted broadly, reaction compartment is heated and is passed through into reaction compartment lazy
Property gas can synchronously, successively or interval carry out, you can with first by reaction compartment progress heating reach predetermined temperature,
I.e. 250~300 degrees Celsius of temperature, is then passed through inert gas into reaction compartment, and reaction compartment will can also carried out
Inert gas is passed through into the reaction compartment during heating, inert gas can also be passed through in reaction compartment first, so
Reaction compartment is heated again afterwards, if it is final realize exist at a temperature of 250~300 degrees Celsius, in reaction compartment it is lazy
Property gas.
Embodiments in accordance with the present invention, the particular type of inert gas is not particularly limited, and those skilled in the art can be with
Appropriate inert gas is selected according to actual needs, as long as the gas does not occur with any material in reaction compartment at high temperature
Chemical reaction.For example, embodiments in accordance with the present invention, argon gas or nitrogen can be selected as inert gas, so as to for
Inert atmosphere is provided in reaction compartment.Temperature in reaction compartment is increased to 800~1200 degrees Celsius, while to reaction compartment
In be passed through hydrogen, the hydrogen and the flow-rate ratio of inert gas being passed through be 1:40~1:1000.In addition, according to the implementation of the present invention
Before example, temperature arrival predetermined temperature that can also be in reaction compartment, while increasing the flow velocity of hydrogen and inert gas, enter
And the effect made annealing treatment to nickel screen surface can be reached, nickel screen surface oxide layer that may be present is reduced, entered
And the performance of subsequent deposition nitrogen-doped graphene can be improved.Liquid precursor is supplied into the reaction compartment.According to this hair
Bright embodiment, the species of liquid precursor is not particularly limited, as long as carbon source and nitrogen can be provided for nitrogen-doped graphene
Source, those skilled in the art can select appropriate liquid itrogenous organic substance matter to be used as liquid forerunner according to the actual requirements
Body.According to a particular embodiment of the invention, the liquid precursor can be acetonitrile, pyridine and pyrroles.According to the one of the present invention
Individual embodiment, selection acetonitrile is as liquid precursor, and the flow velocity of acetonitrile can be 2~1000 μ l/min, and service time can be 2
~60 minutes.Thus, it is possible to by the method for chemical vapor deposition, directly form nitrogen-doped graphene on nickel screen, and then obtain
Obtain catalyst layer.
(2) diffusion layer is set
Embodiments in accordance with the present invention, in this step, first by carbon black and 60 mass % polytetrafluoroethylene (PTFE) (PTFE) point
Dispersion liquid is mixed, and the mass ratio of carbon black and 60 mass %PTFE dispersion liquids is 2:3.In the mixed of carbon black and 60 mass %PTFE dispersion liquids
Ethanol is added in compound to increase the viscosity of said mixture, then, ultrasonic mixing 10-30 points in 80 degrees Celsius of water-bath
Clock, so as to said mixture formation sticky mass.Finally, above-mentioned sticky mass is subjected to forming processes, to be expanded
Dissipate layer 20.Specifically, embodiments in accordance with the present invention, by the sticky mass by integrating, at 80 degrees Celsius, less than 0.5MPa
Pressure under quickly rub pressure, to make ethanol volatilize, and carbon black is combined with PTFE even closer during pressure is rubbed.Then
Repeat above-mentioned rub and press through journey 3-5 times, to improve the compressive property of the diffusion layer of preparation in use.Then, it will pass through
The mixture of pressure is rubbed repeatedly under 80 degrees Celsius, 1.5MPa by vertical compression machine vertical compression 10 seconds, to obtain sticky solid tabletting, is adopted
Diffusion layer is used as with the sticky solid tabletting.Then, diffusion layer is placed on catalyst layer, by modes such as vertical compressions, will urged
Agent layer 10 and diffusion layer 20 are fixed, to obtain air cathode.Thus, it is possible to air cathode is easily obtained, and
And during using this method preparing air cathode, it is not necessary to various pieces are glued together using binding agent, and then can be with
The electrode conductivuty of the air cathode is improved, and simplifies electrode preparation process.
In addition, embodiments in accordance with the present invention, before diffusion layer is set, current collection layer can be set first.Specifically, collect
Electric layer is formed by stainless steel, and current collection layer is arranged between diffusion layer and catalyst layer, or catalyst layer and diffusion layer
It is arranged on the same side of current collection layer.For example, according to some embodiments of the present invention, current collection layer can be the stainless (steel) wire of 50 mesh.
The diffusion layer sticky solid tabletting prepared is directly placed on the stainless (steel) wire of 50 mesh, in 80 degrees Celsius, 4.5MPa bar
1min is rolled under part, so as to which diffusion layer and current collection layer are combined.The diffusion layer rolled and current collection layer are put into Muffle furnace
In, heat treatment makes its curing molding in 15-20 minutes under 340 degrees Celsius.Then, can be by catalyst layer and the diffusion being combined
Layer and current collection layer are put according to the position relationship between three layers, the diffusion then directly combined by catalyst layer, in advance
Layer and current collection layer are fixed by modes such as vertical compressions, and then can obtain air cathode according to embodiments of the present invention.By
This, during preparing air cathode using this method, it is not necessary to various pieces are glued together using binding agent, and then can be with
The electrode conductivuty of the air cathode is improved, and simplifies electrode preparation process.
Embodiments in accordance with the present invention, in the method, can also further set supporting layer.Specifically, supporting layer is
Formed by stainless steel, and supporting layer is arranged between diffusion layer and catalyst layer.Embodiments in accordance with the present invention, in order to
Further simplify the method for preparing air cathode, supporting layer can select have stainless (steel) wire of the same area with current collection layer.Need
It is noted that in the method, the particular location between each layer of air cathode is not particularly limited, as long as the sky can be realized
The function of each layer in gas negative electrode, those skilled in the art can enter to the relative position between each layer according to the actual requirements
Row is set.For example, embodiments in accordance with the present invention, can after diffusion layer and current collection layer are combined together, by supporting layer,
Catalyst layer, the diffusion layer being combined in advance and current collection layer are put according to the position in Fig. 4, then directly pass through vertical compression
It is fixed etc. mode, and then air cathode according to embodiments of the present invention can be obtained.Thus, air is prepared using this method
During negative electrode, it is not necessary to various pieces are glued together using binding agent, and then the electrode of the air cathode can be improved
Electric conductivity, and simplify electrode preparation process.
Thus, it is possible to which easily being obtained using this method need not adopt between air cathode, and each layer of the air cathode
Bonded with binding agent, therefore not only simplify the preparation process of air cathode, it also avoid binding agent for air cathode
The influence of electric conductivity.Further, since employing the nitrogen-doped graphene conduct being formed directly on nickel screen in the air cathode
Catalyst layer, therefore the air cathode prepared using this method has the feature and advantage of previously described air cathode,
This is repeated no more.
In still another aspect of the invention, the present invention proposes a kind of microbiological fuel cell.Embodiments in accordance with the present invention,
With reference to Fig. 5, the fuel cell includes：Housing 100, anode 200, negative electrode 300 and electricity-producing microorganism 400.Specifically, housing
Reaction compartment is limited in 100, anode 200 and negative electrode 300 are arranged in reaction compartment, and electricity-producing microorganism 500 is adhered to
In the outer surface of anode 300.Negative electrode 400 is previously described air cathode according to embodiments of the present invention, and negative electrode 400 sets
Put in reaction compartment, electrically connected with anode 300.Thus, it is possible to by electricity-producing microorganism 500 by the oxidation operation in medium
Decompose, and produce electronics and proton, and electronics is received by negative electrode 400, catalytic oxidation-reduction reacts and generates water.Thus,
The performance of the microbiological fuel cell can be improved.
Wherein, embodiments in accordance with the present invention, anode 300 can be carbon brush, carbon cloth, carbon cloth and granular activated carbon
At least one of formed.Specifically, anode 300 can be appropriately sized for carbon cloth or carbon brush are cut into, and in Muffle furnace
In under 450 degrees Celsius heat treatment obtain within 30 minutes.Thus, it is possible to easily obtain anode 300, and then reduce the Microbial fuel
The production cost of battery.
In addition, it will be appreciated by those skilled in the art that on the premise of not paying creative work, to according to of the invention real
The improvement for applying the microbiological fuel cell progress of example falls within protection scope of the present invention.For example, according to the reality of the present invention
Example is applied, anode 300 and negative electrode 400 can be set with orthogonal；According to another embodiment of the invention, negative electrode 400 with
And between anode 300, can also further have barrier material.Thus, those skilled in the art can be right according to actual conditions
Microbiological fuel cell according to embodiments of the present invention makes corresponding adjustment, selects more suitable structure to constitute microorganism combustion
Battery is expected, as long as meeting previously described feature according to embodiments of the present invention.
Because the microbiological fuel cell employs previously described air cathode as the negative electrode of battery, therefore micro- life
Thing fuel cell has the whole features and advantage of previously described air cathode, will not be repeated here.
In still another aspect of the invention, the present invention proposes previously described microbiological fuel cell in processing aqueous medium
In application.Thus, it is possible to improve the using effect of the fuel cell.It should be noted that in the present invention, " processing is aqueous
Medium " is by the way that the electrolyte of aqueous medium as microbiological fuel cell is realized.Thus, it is possible to will be according to of the invention real
The air cathode of example is applied as the negative electrode in microbiological fuel cell, and for handling sewage, desalination, pollution amelioration and preparation
Sensor etc..In the present invention, term " aqueous medium " can be sewage, salting liquid, cushioning liquid or microbiological culture media
Deng.
Below by specific embodiment, the present invention will be described, it is necessary to which explanation, specific embodiment below is only
It is to be for the purpose of illustration, without limiting the scope of the present invention in any way, in addition, unless otherwise specified, then it is not specific to remember
The method of carrier strip part or step is conventional method, and the reagent and material used is commercially obtained.X-ray light
Electron spectrum (XPS) is obtained using the spectrometer of Thermo ESCALAB 250.
Embodiment 1：Prepare catalyst layer
40 mesh nickel screens are cut into 4cm × 8cm rectangle, is put into distilled water and is cleaned by ultrasonic 5-10 minutes, nickel is removed
The impurity such as the dust of net surface.Nickel screen after cleaning, which is curled into, can be put into the shape of quartz boat, it is ensured that between nickel screen
It is contactless, so as to reacting gas good contact.Nickel screen is placed on quartz boat, quartz boat is connected with a copper wire,
Copper wire end winds iron wire, and quartz boat is slowly pushed into the middle part of reative cell.Ensure that iron wire is partially left at outside reative cell.
Preheating zone winds heating tape, and design temperature is 270 degrees Celsius.The air-tightness of reaction unit is checked, if air-tightness is good, is passed through
Air in 300mL/min argon gas, discharger.Reative cell furnace temperature is set as 1000 degrees Celsius, and the heating-up time is 100min,
Heating is passed through 300mL/min argon gas and 20mL/min hydrogen into reative cell simultaneously.Before reative cell reaches design temperature
During 30min, adjustment argon flow amount is 1000mL/min, and hydrogen flowing quantity is 50mL/min, nickel screen is made annealing treatment, reduced nickel
The oxide layer of net surface, while reaching the effect of crystal grain homogenization.Reach after design temperature, the gentle gas flow of holding furnace is not
Become, be fed to acetonitrile in reative cell with 20 μ L/min feed rate with feed pump, the feeding time is 20min.Feeding terminates
Afterwards, feed pump is closed.Quartz boat is pulled into room temperature from high-temperature region rapidly with magnet, nickel screen is quickly cooled down.Simultaneously by gas stream
Amount is adjusted to argon gas 300mL/min, hydrogen 20mL/min.Treat that furnace temperature is cooled to less than 200 degrees Celsius, open quartz ampoule, take out sample
Product.
Embodiment 2：Prepare catalyst layer
Reference implementation example 1, difference is, the sample rate of acetonitrile is 10 μ L/min, and sample injection time is 5 minutes.
Embodiment 3：Prepare catalyst layer
Reference implementation example 1, difference is, the sample rate of acetonitrile is 20 μ L/min, and sample injection time is 5 minutes.
Embodiment 4：Prepare catalyst layer
Reference implementation example 1, difference is, the sample rate of acetonitrile is 30 μ L/min, and sample injection time is 5 minutes.
Embodiment 5：Prepare catalyst layer
Reference implementation example 1, difference is, the sample rate of acetonitrile is 50 μ L/min, and sample injection time is 5 minutes.
Embodiment 6：Prepare catalyst layer
Reference implementation example 1, difference is, the sample rate of acetonitrile is 20 μ L/min, and sample injection time is 10 minutes.
Embodiment 7：Prepare catalyst layer
Reference implementation example 1, difference is, the sample rate of acetonitrile is 20 μ L/min, and sample injection time is 15 minutes.
Fig. 6 and Fig. 7 be the catalyst layer prepared in embodiment 1~7 under different resolution scanning electron microscope (SEM) photograph (Fig. 6 b,
Fig. 6 e, Fig. 7 b, Fig. 7 e are the catalyst layer stereoscan photograph prepared in embodiment 3).With reference to Fig. 6 (a-d) and Fig. 7 (a-d)
(stereoscan photograph of the catalyst layer respectively prepared under different resolution in embodiment 2~5) is when sample injection time is 5 points
Zhong Shi, contrasts different acetonitrile sample rates, with the lifting of sample rate, nitrogen-doped graphene surface folding increases, and occurs
Little particle aggregate, therefore in sample rate increase, can cause containing for defect in the nitrogen-doped graphene prepared and impurity
Amount increase.With reference to Fig. 6 (e-h) and Fig. 7 (e-h) (catalysis respectively prepared under different resolution in embodiment 1,3,6 and 7
The stereoscan photograph of oxidant layer), when sample rate is 20 μ L/min, different acetonitrile sample injection times are contrasted, with sample introduction
Time lengthening, nitrogen-doped graphene thickness is thickening.
With reference to Fig. 8 (A), different acetonitrile sample rates are contrasted, the N doping obtained using 20 μ L/min feed rate
Graphene shows best graphene-structured in Raman spectrum, i.e., do not occur being located at 1300cm-1The representative graphite of left and right
The D peaks of defect content in alkene structure, with reference to Fig. 8 (B), the 2D peaks of the nitrogen-doped graphene of all sample rates and the ratio at G peaks
Between 0.25 to 0.35, it is sandwich construction to represent nitrogen-doped graphene structure.In addition, with reference to Fig. 8, to being obtained in embodiment 1
The nitrogen-doped graphene obtained has carried out the test of x-ray photoelectron power spectrum.Specifically, Fig. 9 (a) is nitrogen-doped graphene photoelectron energy
Spectrogram, Fig. 9 (b) is the fine energy spectrum diagrams of N1s.With reference to Fig. 9 (b), above-mentioned nitrogen-atoms is in the nitrogen-doped graphene with graphite nitrogen, pyrrole
Cough up nitrogen and pyridine nitrogen is present, be conducive to above-mentioned three types nitrogen to strengthen the hydrogen reduction of the nitrogen-doped carbon by acting synergistically
Catalytic activity.
Embodiment 8：Prepare air cathode
First, diffusion layer is prepared.Carbon black and PTFE mass ratio are controlled 2 on diffusion layer:The load capacity of 3, i.e. carbon black is about
For 25mg/cm2, and PTFE load capacity is about 37.5mg/cm2, according to 11.3cm2Size weigh carbon black and PTFE, add suitable
Measure ethanol, increase mixture viscosity.The ultrasonic mixing 10-30min in 80 degrees Celsius of water-bath is until form sticky mass.It is viscous
Thick liquid matter is quickly rubbed pressure under 80 degrees Celsius, the pressure less than 0.5MPa, then integrated repeatedly with condition of similarity by kneading
Compacting is integrated 3-5 times again, the vertical compression 10s under 80 degrees Celsius, 1.5MPa.Sticky solid after obtained compacting is placed on 50 mesh
Stainless (steel) wire (being used as current collection layer) on, the pressurize 1min under conditions of 80 degrees Celsius, 4.5MPa.By the diffusion layer rolled with
And current collection layer is put into Muffle furnace, being heat-treated 15-20min at 340 degrees Celsius makes its curing molding.Take 50 purposes stainless again
Steel mesh is as supporting layer, and the Catalytic Layer that will be prepared in embodiment 1 is clipped between current collection layer and supporting layer, is directly placed into reactor
In press to together.Each layer relative position reference Fig. 4.
Embodiment 9：Prepare air cathode
Reference implementation example 8, difference is during preparing diffusion layer, and the sticky solid after compacting is directly placed
On the nickel screen for having loaded nitrogen-doped graphene, with the pressurize 1min under conditions of 80 degrees Celsius, 3MPa.Directly using nickel screen as
Current collection layer and supporting layer, using the obtained nickel screen for having suppressed diffusion layer as air cathode, each interlayer relative position reference Fig. 1.
Embodiment 10：Prepare air cathode
Reference implementation example 8, difference is during preparing air cathode, will load the nickel of nitrogen-doped graphene
Net and the stainless (steel) wire for having suppressed diffusion layer are compressed together, and wherein nickel screen is towards diffusion layer side, and stainless (steel) wire is towards air
Side.
Embodiment 11：Prepare microbiological fuel cell
Using the air cathode prepared in embodiment 8 as negative electrode.
Prepare anode：Using the attachment as anode and electricity production bacterium such as carbon brush, carbon cloth, carbon cloth or granular activated carbon
Thing, carbon brush or carbon cloth or carbon cloth are heat-treated 30min in Muffle furnace under 450 degrees Celsius.
By above-mentioned anode, air cathode composition single chamber type microbiological fuel cell, the electricity production of the continuous operation more than 1 year of inoculation
Bacterium, connects external circuit, tests single chamber type microbiological fuel cell performance.The electrolyte used for neutral phosphate buffer,
Wherein contain 1g/L sodium acetate as substrate, 12.5mL/L mineral matter and 5mL/L vitamin supplement nutriment.
Comparative example 1：
Comparative example 1 is prepared for the widely used platinum carbon air cathode (Pt) in microbiological fuel cell.Wherein, Pt
The catalyst of negative electrode is platinum carbon powder (the C1-10 10%wt.Pt on Carbon Black Vulcan that platinum containing amount is 10 mass %
XC-72R, BASF Fuel Cell Inc, the U.S.), platinum carbon powder load capacity is 5mg/cm2,.Specifically, Pt cathode preparing methods
It is as follows：
(1) it is coated with carbon based layer.Carbon cloth is cut out into the rectangle for 4 × 8cm.Weigh 50mg carbon black powders, load 10mL from
In heart pipe, the mass %PTFE solution of 600 μ L 40 is added, 6~8 beades is added, uses oscillator shaken well, about 20
Second.The molten slurry of carbon black is applied on carbon cloth with paintbrush brush.After the completion of coating, natural air drying at least two hours under air.It
Carbon cloth is placed in temperature is constant to be heated about 25 minutes in 370 degrees Celsius of Muffle furnace afterwards, takes out, is cooled to after the completion of heat treatment
Room temperature.
(2) it is coated with diffusion layer.60 mass %PTFE solution coatings are being coated with carbon based layer side with paintbrush brush
On carbon cloth, air-dry about 10 minutes under air, until PTFE layers become white completely.Carbon cloth is put into 370 degrees Celsius of constant temperature
Muffle furnace in, heat about 12 minutes, make PTFE layer solidification, after the completion of heating taking-up, be cooled to room temperature, PTFE layers are changed into greyish white
Color.Above step is repeated, untill PTFE layers are painted with 4 layers.Carbon cloth is processed into a diameter of 3.8cm of two panels with mould and hammer
Circle.
(3) coating catalytic layer.Each negative electrode weighs the platinum carbon powder (C1-10 10% that 60mg platinum containing amounts are 10 mass %
Wt.Pt on Carbon Black Vulcan XC-72R, BASF Fuel Cell Inc, the U.S.), it is put into 10mL centrifuge tubes
It is interior, add 50 μ L deionized water and 6~8 beades, oscillator vibration about 20s.Add 400 μ L Nafion solutions and
200 μ L high-purity isopropanols, oscillator vibration about 20s.Cloth Catalytic Layer is brushed with paintbrush, and carbon based layer and diffusion are not contained in carbon cloth
The side of layer, natural air drying at least 24 hours after the completion of coating.
Electrochemical half-cell is tested
The chemical property of the negative electrode prepared below to above-described embodiment is tested.Using what is prepared in embodiment 1~7
Catalyst layer, air cathode is prepared according to the method for embodiment 8.Reactor is double chamber type reactor, and two body cavities are by the moon
Amberplex separates；It is platinum plate electrode to electrode, reference electrode is saturated calomel reference electrode, and working electrode is to be determined
Air cathode or platinum carbon negative electrode.Negative electrode is fixed by o-ring, and diffusion layer side exposes in atmosphere.Negative electrode is used as using titanium sheet
Draw electric material.Electrolyte is 50mM phosphate buffer solution.The formula of 50mM phosphate buffer solution is as shown in the table.
The 50mM phosphate buffer solutions of table 1
| Material | Concentration |
| Disodium hydrogen phosphate (Na2HPO4) | 4.57g/L |
| One hypophosphite monohydrate sodium dihydrogen (NaH2PO4·H2O) | 2.45g/L |
| Ammonium chloride (NH4Cl) | 0.31g/L |
| Potassium chloride (KCl) | 0.13g/L |
Cathode performance is evaluated using linear sweep voltammetry, open circuit is after 3 hours, from onset potential 0V (reference electricity
Extremely saturation calomel) start measurement, destination potential is -0.4V (reference electrode is saturated calomel electrode), with active cathodic area
7cm2Convert as current density.With reference to Figure 10, arrived in -0.3V under -0.4V same potentials, 20 μ L/min solution enter in embodiment 1
The current density of maximum is obtained to speed, with solution feeding time increase, current density gradually increases.
Microbiological fuel cell is tested
The microorganism prepared in microbiological fuel cell according to embodiments of the present invention and above-mentioned comparative example is fired below
Expect that battery carries out performance test.The microbiological fuel cell is single chamber type reactor, and no barrier film, anode is carbon brush, by carbon fiber
Silk is constituted with titanium silk, and wherein titanium silk is heat-treated for 30 minutes as current-collecting member by 450 degrees Celsius.Anode is placed horizontally at instead
Answer in the middle part of device, negative electrode place with reactor side, diffusion layer is towards and exposed to air.It is inoculated with using Mixed Microbes, inoculation source is
The air type microbiological fuel cell water outlet of operation more than 1 year, initial inoculation source is derived from sewage treatment plant's primary sedimentation pond
Sanitary sewage.Matrix is neutral 50mM phosphate buffers, wherein contain 1g/L sodium acetate as substrate, 12.5mL/L's
The vitamin supplement nutriment of mineral matter and 5mL/L, and the COD (COD) of the matrix is 780mg/L.
Polarization curve is determined using extrernal resistance method is changed, the power density of microbiological fuel cell is calculated.Reactor is from 1000
Ω progressively successively decreases operation to 20 Ω, under each resistance, runs complete cycle.
First, with reference to Figure 11 (a), using the catalyst layer prepared in embodiment 2~5, and according to the method in embodiment 2
Prepare air cathode.With reference to Figure 11 (a), when sample rate is 20 μ L/min, the platinum carbon with being prepared in comparative example 1 can be obtained
The suitable maximum surface power density of air cathode numerical value, with reference to Figure 12 (a) and Figure 13 (a), when sample rate is 20 μ L/
During min, maximum cathode potential is obtained, with minimum negative electrode internal resistance.But air cathode according to embodiments of the present invention due to
The noble metals such as platinum are not contained with extremely low catalyst loadings, and in catalyst layer, therefore cost will be well below platinum carbon
Air cathode.
Air cathode is obtained using the catalyst layer prepared in embodiment 1,3,6,7, and according to the method in embodiment 8.
With reference to Figure 11 (b), the air cathode that each sample injection time is obtained has obtained the surface power density higher than comparative example 1.Join simultaneously
Figure 12 (b) and Figure 13 (b) are examined, with the growth of sample injection time, the air cathode potential of acquisition is gradually stepped up, and negative electrode internal resistance is gradually
Reduce, the respectively less than negative electrode internal resistance in comparative example 1.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. a kind of air cathode, it is characterised in that including：
Catalyst layer, the catalyst layer contains nitrogen-doped graphene；And
Diffusion layer,
Wherein, binding agent is free of in the catalyst layer, the catalyst layer includes metallic substrates and the N doping graphite
Alkene, the nitrogen-doped graphene is supported in the metallic substrates, and the catalyst layer is formed through the following steps：
Quartz boat containing the metallic substrates is placed in closed reaction compartment, wherein, the metallic substrates include nickel screen
At least one of and nickel foam；
Under 250~300 degrees Celsius, inert gas is passed through into the reaction compartment, to discharge in the reaction compartment
Air；
Temperature in the reaction compartment is increased to 800~1200 degrees Celsius, while hydrogen is passed through into the reaction compartment,
The flow-rate ratio of the hydrogen and the inert gas is 1:40~1:1000；And
Liquid precursor is supplied into the reaction compartment, the liquid precursor is included selected from acetonitrile, pyridine and pyrroles
At least one, the flow velocity of the liquid precursor is 2~1000 μ l/min, and the service time of the liquid precursor is 2~60
Minute, to load the nitrogen-doped graphene in the metallic substrates, and then obtain the catalyst layer.
2. air cathode according to claim 1, it is characterised in that further comprise：
Current collection layer, wherein,
The current collection layer is formed by stainless steel, the current collection layer be arranged on the diffusion layer and the catalyst layer it
Between, or
The catalyst layer and the diffusion layer are arranged on the same side of the current collection layer.
3. air cathode according to claim 2, it is characterised in that further comprise：
Supporting layer, the supporting layer is arranged between the diffusion layer and the catalyst layer, and the supporting layer is by stainless
Steel formation.
4. air cathode according to claim 3, it is characterised in that the catalyst layer formation is the one of the current collection layer
Side, the supporting layer formation is in side of the catalyst layer away from the current collection layer, and the diffusion layer formation is in the support
Side of the layer away from the catalyst layer.
5. air cathode according to claim 1, it is characterised in that in the catalyst layer, the nitrogen-doped graphene
Load capacity be not more than 2.5 μ g/cm2。
6. a kind of method for preparing air cathode, it is characterised in that including：
(1) nitrogen-doped graphene is loaded on the metallic substrate, to obtain catalyst layer；And
(2) diffusion layer is set in the side of the catalyst layer, to obtain the air cathode,
Wherein, the catalyst layer through the following steps that formed：
Quartz boat containing the metallic substrates is placed in closed reaction compartment, wherein, the metallic substrates include nickel screen
At least one of and nickel foam；Under 250~300 degrees Celsius, inert gas is passed through into the reaction compartment, to discharge
Air in the reaction compartment；Temperature in the reaction compartment is increased to 800~1200 degrees Celsius, while to described anti-
Answer and hydrogen is passed through in space, the flow-rate ratio of the hydrogen and the inert gas is 1:40~1:1000；And to the reaction
Liquid precursor is supplied in space, the liquid precursor is included selected from least one of acetonitrile, pyridine and pyrroles, the liquid
The flow velocity of state presoma is 2~1000 μ l/min, and the service time of the liquid precursor is 2~60 minutes, so as to described
The nitrogen-doped graphene, and then the acquisition catalyst layer are loaded in metallic substrates,
The diffusion layer through the following steps that formed：It is 2 to take mass ratio:3 carbon black and teflon mixture, plus
Enter ethanol and ultrasound extremely forms mixture of viscous form in 10~30 minutes in 80 C water baths；The mixture of viscous form is entered
Row forming processes, to obtain the diffusion layer.
7. method according to claim 6, it is characterised in that before the diffusion layer is set, pre-set current collection layer,
The current collection layer is formed by stainless steel, wherein, the current collection layer be arranged on the diffusion layer and the catalyst layer it
Between, or the catalyst layer and the diffusion layer be arranged on the same side of the current collection layer.
8. method according to claim 6, it is characterised in that methods described further comprises：Supporting layer, the branch are set
Support layer is arranged between the diffusion layer and the catalyst layer, and the supporting layer is formed by stainless steel.
9. a kind of microbiological fuel cell, it is characterised in that including：
Reaction compartment is limited in housing, the housing；
Anode, the anode is arranged in the reaction compartment；
Electricity-producing microorganism, the electricity-producing microorganism is attached to the outer surface of the anode；And
Air cathode described in any one of Claims 1 to 5, the air cathode is arranged in the reaction compartment, and institute
Air cathode is stated to electrically connect with the anode.
10. the microbiological fuel cell described in claim 9 is handling the purposes of aqueous medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510728798.6A CN105355926B (en) | 2015-10-30 | 2015-10-30 | Air cathode, air cathode preparation method and microbiological fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510728798.6A CN105355926B (en) | 2015-10-30 | 2015-10-30 | Air cathode, air cathode preparation method and microbiological fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105355926A CN105355926A (en) | 2016-02-24 |
| CN105355926B true CN105355926B (en) | 2017-09-22 |
Family
ID=55331843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510728798.6A Active CN105355926B (en) | 2015-10-30 | 2015-10-30 | Air cathode, air cathode preparation method and microbiological fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105355926B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107431214A (en) * | 2015-04-13 | 2017-12-01 | 松下电器产业株式会社 | Electrode assembly and microbiological fuel cell |
| JP6224269B1 (en) * | 2016-03-01 | 2017-11-01 | 株式会社日立製作所 | Water treatment apparatus and conductive porous carbon material used therefor |
| CN106025296A (en) * | 2016-07-27 | 2016-10-12 | 同济大学 | Nitrogen-phosphorus double-doped carbon material as well as preparation method and application thereof |
| CN107024521B (en) * | 2017-04-24 | 2020-02-04 | 中国农业大学 | Detect sewage concentration's biosensor |
| CN107381725B (en) * | 2017-06-26 | 2023-03-31 | 清华大学 | Air cathode, preparation method and sewage treatment system |
| CN107623130B (en) * | 2017-10-13 | 2019-04-09 | 吉林大学 | A kind of air cathode of imitative fish gill filament structure |
| CN108963271A (en) * | 2018-07-15 | 2018-12-07 | 四川康成博特机械制造有限公司 | A kind of air cell electrode structure and preparation method thereof |
| CN112946039B (en) * | 2021-01-29 | 2023-02-17 | 大连海事大学 | Ammonia nitrogen sensor and ammonia nitrogen detection method |
| CN113072144A (en) * | 2021-04-26 | 2021-07-06 | 哈尔滨工业大学 | Preparation method and application of nitrogen-doped electro-Fenton cathode |
| CN113915928B (en) * | 2021-09-10 | 2023-04-07 | 海信冰箱有限公司 | A kind of refrigerator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100723385B1 (en) * | 2005-09-23 | 2007-05-30 | 삼성에스디아이 주식회사 | Membrane electrode assembly and fuel cell system adopting the same |
| CN104525235A (en) * | 2014-12-18 | 2015-04-22 | 华南理工大学 | Nitrogen-doped graphene catalyst as well as preparation method and application thereof |
| CN205355154U (en) * | 2015-10-30 | 2016-06-29 | 清华大学 | Air negative pole and microbiological fuel cell |
-
2015
- 2015-10-30 CN CN201510728798.6A patent/CN105355926B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105355926A (en) | 2016-02-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105355926B (en) | Air cathode, air cathode preparation method and microbiological fuel cell | |
| CN104894595B (en) | A kind of amorphous metal oxide hydrogen-precipitating electrode of high catalytic activity and preparation method thereof | |
| CN105776174B (en) | Nitrogen-doped porous carbon nanosheet and preparation method and application thereof | |
| CN106784865A (en) | A kind of nitrogen co-doped carbosphere of iron and preparation method, purposes and oxygen reduction electrode | |
| CN102760888A (en) | Preparation and application of graphene/substrate electrode and polyaniline-graphene/substrate electrode | |
| CN108649236A (en) | A kind of the air pole material and preparation method of intermediate temperature solid oxide fuel cell | |
| CN108172852A (en) | A kind of anode of microbial fuel cell, preparation method and microbiological fuel cell | |
| CN105161730B (en) | Air cathode and microbiological fuel cell | |
| CN104112864B (en) | A kind of microbiological fuel cell | |
| CN106757143A (en) | A kind of water decomposition reaction catalysis electrode and preparation method thereof | |
| CN109482214A (en) | The catalyst and preparation method of a kind of graphene-supported ruthenium metal and application | |
| CN107195908B (en) | A kind of foamed material composite cathode of microorganism electrolysis cell and preparation method thereof | |
| CN108704663A (en) | A kind of preparation method of the nano combined electrocatalysis material of bimetallic carbon | |
| CN108336374A (en) | Nitrogenous carbon material of a kind of high-performance ternary Fe-Co-Ni codopes and its preparation method and application | |
| CN108611655A (en) | A kind of electrode of electrode unit and its composition | |
| CN110400939A (en) | Preparation method of biomass nitrogen-doped porous carbon-oxygen reduction catalyst | |
| CN108048955B (en) | Preparation method of strontium iron molybdenum based double perovskite type metal oxide nano fiber | |
| CN205355154U (en) | Air negative pole and microbiological fuel cell | |
| CN106159281A (en) | A kind of high-performance microbiological fuel cell based on molybdenum nitride negative electrode | |
| CN114784303A (en) | Preparation and application of copper polyphenol supramolecular network interface modified rare earth-based organic frame cathode material | |
| CN110408953A (en) | A kind of porous core-shell nano line flexible array electrode of phosphorus doping tungsten sulfide@tungsten oxide and preparation method thereof | |
| CN109841841B (en) | High-temperature fuel cell cathode material and preparation and application thereof | |
| CN109939707A (en) | Two cobalt@nickel tungstate nucleocapsid heterojunction material of phosphatization and the preparation method and application thereof | |
| CN113151847A (en) | Preparation method and application of working electrode of solid oxide electrolytic cell | |
| CN110265681B (en) | Composite electrode for catalyzing oxidation of sodium formate and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |