CN105390688A - Manufacturing method for copper oxide loaded titanium dioxide nano through tube array and application of copper oxide loaded titanium dioxide nano through tube array - Google Patents
Manufacturing method for copper oxide loaded titanium dioxide nano through tube array and application of copper oxide loaded titanium dioxide nano through tube array Download PDFInfo
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- CN105390688A CN105390688A CN201510126661.3A CN201510126661A CN105390688A CN 105390688 A CN105390688 A CN 105390688A CN 201510126661 A CN201510126661 A CN 201510126661A CN 105390688 A CN105390688 A CN 105390688A
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- siphunculus
- copper oxide
- nano titania
- titanium dioxide
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 203
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 239000005751 Copper oxide Substances 0.000 title claims abstract description 56
- 229910000431 copper oxide Inorganic materials 0.000 title claims abstract description 56
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000004070 electrodeposition Methods 0.000 claims abstract description 18
- 239000010936 titanium Substances 0.000 claims abstract description 17
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 14
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002071 nanotube Substances 0.000 claims abstract description 11
- 230000003647 oxidation Effects 0.000 claims abstract description 11
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 11
- 238000001354 calcination Methods 0.000 claims abstract description 9
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910001431 copper ion Inorganic materials 0.000 claims abstract description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 7
- 239000010949 copper Substances 0.000 claims abstract description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 29
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 23
- 239000000243 solution Substances 0.000 claims description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 15
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 13
- 229910052697 platinum Inorganic materials 0.000 claims description 9
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 230000004888 barrier function Effects 0.000 claims description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 239000010405 anode material Substances 0.000 claims description 5
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 5
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000009938 salting Methods 0.000 claims description 4
- 229910021591 Copper(I) chloride Inorganic materials 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims 1
- 239000007772 electrode material Substances 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000008151 electrolyte solution Substances 0.000 abstract 1
- 229910052731 fluorine Inorganic materials 0.000 abstract 1
- 239000011737 fluorine Substances 0.000 abstract 1
- 239000007774 positive electrode material Substances 0.000 abstract 1
- 239000012266 salt solution Substances 0.000 abstract 1
- 229960004643 cupric oxide Drugs 0.000 description 49
- 238000001035 drying Methods 0.000 description 15
- 229910052744 lithium Inorganic materials 0.000 description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 230000004087 circulation Effects 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 239000004519 grease Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000000126 substance Substances 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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
-
- 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
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a manufacturing method for a copper oxide loaded titanium dioxide nano through tube array and an application of the copper oxide loaded titanium dioxide nano through tube array, and belongs to the technical field of manufacturing of electrode materials of lithium ion batteries. The method comprises the following steps of: (1) in a fluorine-containing electrolyte solution, taking a pure titanium sheet as a positive electrode, manufacturing a highly ordered titanium dioxide nanotube array with a positive electrode oxidation method, and removing a blocking layer at the bottom of the titanium dioxide nanotube array with a voltage-increasing method when the positive electrode oxidation is ended to obtain a titanium dioxide nano through tube array; and (2) putting the manufactured nano through tube array in a copper ion-containing salt solution, manufacturing a copper loaded titanium dioxide nano through tube array with an electrodeposition method, and then performing calcining in air to obtain the copper oxide loaded titanium dioxide nano through tube array. The copper oxide loaded titanium dioxide nano through tube array manufactured with the method serves as a positive electrode material of a lithium ion battery to be subjected to battery assembly; and by detecting electrochemical performance of the battery, it is shown that the lithium ion battery manufactured from the electrode material has a relatively high specific discharge capacity.
Description
Technical field
The present invention relates to a kind of preparation method and application of nano titania siphunculus array electrode of loaded copper oxide, belong to lithium ion battery electrode material preparing technical field.
Background technology
Along with the consumption gradually of the fossil fuel such as oil, coal, be that the new forms of energy system of representative receives worldwide concern with lithium ion battery.Lithium ion battery due to its high power capacity, high-energy-density, the advantage such as have extended cycle life, be widely used in the electronic device such as mobile phone, digital camera, and lithium ion battery is also considered to the main source of hybrid vehicle, the energy supply of intelligent grid contour electrical demand equipment.
Lithium ion battery is primarily of composition such as part such as four, negative electrode, anode, electrolyte and barrier film etc.At present, the lithium ion battery anode material of suitability for industrialized production is carbon class material, and its theoretical capacity is 372mAhg
-1, but due to its too low embedding lithium voltage (0.1VvsLi/Li+), solid electrolyte intermediate coat (SEI film) can be formed in charge and discharge process, consume transferable lithium ion quantity, certain risk is caused to the safe handling of lithium battery.Antianode material, the focus of research mainly concentrates on Si sill, metal oxide and advanced material with carbon element.For other anode materials, the theoretical capacity of titanium dioxide is 335mAhg
-1, there is higher operating voltage (1.7VvsLi/Li+), the formation of SEI film can be avoided, and change in volume is little and obtain and study widely in cyclic process.Cupric oxide can with the redox reaction of lithium metal generation displaced type (
), displaced very large charge number when this lithium pass through mechanism makes battery operated, release great specific capacity, but in de-/embedding lithium process, the volumetric expansion that cupric oxide is larger easily causes efflorescence and the inefficacy of electrode material, and lithium battery capacity is declined rapidly.
In order to improve Anode of lithium cell material discharging specific capacity further, meet the demand of high electricity requirement power equipment, the present invention utilizes electro-deposition method, by high theoretical capacity (675mAhg
-1) cupric oxide load in nano titania siphunculus array, the nano titania siphunculus array of hollow is that the load of cupric oxide provides position, and the volumetric expansion of cupric oxide can be limited to a certain extent, reach the object improving this anode material lithium electrical property.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of nano titania siphunculus array of loaded copper oxide, nano titania siphunculus array the method prepared, as Anode of lithium cell material, can improve the specific discharge capacity of Anode of lithium cell material.
The preparation method of the nano titania siphunculus array of this loaded copper oxide specifically comprises the following steps:
(1) nano titania siphunculus array is prepared: also dry to pure titanium sheet cleaning, then be positive pole with titanium sheet, platinized platinum is to electrode, in the soluble-salt aqueous solution of fluoride ion or the organic solution of fluoride ion, 1 ~ 5h is oxidized with constant voltage 20 ~ 60V, and powered-down after voltage-regulation to 60 ~ 100V being kept 5 ~ 10s at the end of anodic oxidation, remove Nano tube array of titanium dioxide bottom barrier, obtain the nano titania siphunculus array of high-sequential;
(2) electro-deposition method prepares the nano titania siphunculus array of loaded copper oxide: the nano titania siphunculus array prepared with step (1) is for negative pole, platinized platinum is to electrode, electro-deposition 3 ~ 10min under 3 ~ 5V constant-pressure conditions in the salting liquid of copper ions, then 400 ~ 500 DEG C of temperature lower calcination 2 ~ 4h in atmosphere, obtain the nano titania siphunculus array of loaded copper oxide.
Described in step (1) is NaF, KF or NH containing villiaumite
4f, the soluble-salt aqueous solution of described fluoride ion is the H of 0.2 ~ 0.5mol/L
3pO
4, Na
2sO
4, (NH
4)
2sO
4or K
2sO
4solution, the organic solution of fluoride ion is ethylene glycol, glycerol, diethylene glycol (DEG), formamide or dimethyl sulfoxide (DMSO); In the soluble-salt aqueous solution of fluoride ion, fluorine ion mass percent is 0.5 ~ 3%, and in the organic solution of fluoride ion, fluorine ion mass percent is 0.25 ~ 0.5%.
The salting liquid of the copper ions described in step of the present invention (2) is CuSO
45H
2o, Cu (NO
3)
23H
2o or CuCl
22H
2o; Copper ion concentration is 0.005 ~ 0.02mol/L.
Electro-deposition voltage described in step of the present invention (2) is 3 ~ 5V, and sedimentation time is 3 ~ 10min.
Calcination time described in step of the present invention (2) is 2 ~ 4 hours, and temperature is 400 ~ 500 DEG C
The nano titania siphunculus array of the loaded copper oxide that the preparation method of the nano titania siphunculus array of loaded copper oxide of the present invention prepares is for the preparation of Anode of lithium cell material.
Beneficial effect of the present invention is:
(1) the nano titania siphunculus array electrode of loaded copper oxide of the present invention assembles the lithium battery obtained, at 0.1C(33mAg
-1) current density under, the charge/discharge capacity of the nano titania siphunculus array lithium battery of loaded copper oxide is significantly improved;
(2) the nano titania siphunculus array electrode material that the present invention utilizes anodic oxidation, electro-deposition method prepares loaded copper oxide, the method is simple to operate, cost is low, good chemical property is shown in lithium ion battery, load material and matrix have good bond strength, are conducive to the application of titanium dioxide anode material suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the SEM figure of the nano titania siphunculus array of loaded copper oxide, and wherein (a) is upper surface topography, and (b) is lower surface pattern;
Fig. 2 is the nano titania siphunculus array of loaded copper oxide and the XRD analysis figure of pure titinium dioxide nanometer siphunculus array;
Fig. 3 is that the nano titania siphunculus array electrode of loaded copper oxide and pure titinium dioxide nanometer siphunculus array electrode are at 0.1C(33mAg
-1), the 1st, 2,5 charging and discharging curve figure under the test condition of 1 ~ 3V;
Fig. 4 is that the nano titania siphunculus array electrode of loaded copper oxide and pure titinium dioxide nanometer siphunculus array electrode are at 0.1C(33mAg
-1), 30 circulation specific discharge capacity figure under 1 ~ 3V test condition.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but protection scope of the present invention is not limited to described content.
Embodiment 1
(1) prepare nano titania siphunculus array: pure Ti sheet (thickness 0.1mm, purity 99.9%) is immersed successively acetone, absolute ethyl alcohol, deionized water for ultrasonic clean and remove surperficial grease in 10 minutes, and in drying box drying for standby; Make positive pole with pure Ti sheet, Pt sheet, as to electrode, is containing 0.5wt%NH
4the ethylene glycol organic solution of F, 1 hour is oxidized with constant voltage 60V, and powered-down after voltage-regulation being kept 5s to 100V at the end of anodic oxidation, remove Nano tube array of titanium dioxide bottom barrier, obtain the nano titania siphunculus array of high-sequential; By obtained sample washes of absolute alcohol, drying for standby.
(2) electro-deposition method prepares the nano titania siphunculus array of loaded copper oxide: the nano titania siphunculus array prepared with step (1) is for negative pole, and platinized platinum is to electrode, at 0.02mol/LCuSO
4electro-deposition 3min under 5V constant-pressure conditions in solution, then 450 DEG C of temperature lower calcination 3h in atmosphere, obtain the nano titania siphunculus array of loaded copper oxide.
Fig. 1 is the upper and lower surface topography of the nano titania siphunculus array of loaded copper oxide, as seen from Figure 1, after high voltage process at the end of anodic oxidation, Nano tube array of titanium dioxide both ends open, for arranging orderly nano titania siphunculus array, and load at the upper surface of nano titania siphunculus array, (Fig. 1 cupric oxide a) is that wire and graininess cover on nano titania siphunculus array, load is graininess at the cupric oxide of the lower surface (Fig. 1 b) of nano titania siphunculus array, and has obvious agglomeration; Fig. 2 is the nano titania siphunculus array of loaded copper oxide and the XRD analysis figure of pure titinium dioxide nanometer siphunculus array, as seen from Figure 2, after 450 DEG C of annealing in process, titanium dioxide all exists with anatase crystalline structure form, compare with pure titinium dioxide nanometer siphunculus array (Fig. 2 b), (a) there is the diffraction maximum of cupric oxide in Fig. 2 to the nano titania siphunculus array of loaded copper oxide; Nano titania siphunculus array electrode and front 30 the circulation specific discharge capacity figure of pure titinium dioxide nanometer siphunculus array electrode of Fig. 3 to be the nano titania siphunculus array electrode of loaded copper oxide and pure titinium dioxide nanometer siphunculus array electrode the 1st, 2,5 charging and discharging curve figure, Fig. 4 be loaded copper oxide; The nano titania siphunculus array electrode that result shows loaded copper oxide first discharge capacity is 444mAhg
-1, be almost pure titinium dioxide nanometer siphunculus array electrode discharge capacity (153mAhg first
-1) three times, and 30 times circulation after, the nano titania siphunculus array electrode discharge capacity of loaded copper oxide still remains on 147mAhg
-1, higher than the discharge capacity (125mAhg of pure titinium dioxide nanometer siphunculus array electrode
-1).In sum, the nano titania siphunculus array electrode of working load cupric oxide, the capacity of battery obtains obvious lifting.
Embodiment 2
(1) prepare nano titania siphunculus array: pure Ti sheet (thickness 0.15mm, purity 99.8%) is immersed successively acetone, absolute ethyl alcohol, deionized water for ultrasonic clean and remove surperficial grease in 10 minutes, and in drying box drying for standby; Make positive pole with pure Ti sheet, Pt sheet, as to electrode, is containing 0.3wt%NH
4the ethylene glycol organic solution of F, 2 hours are oxidized with constant voltage 40V, and powered-down after voltage-regulation being kept 7s to 80V at the end of anodic oxidation, remove Nano tube array of titanium dioxide bottom barrier, obtain the nano titania siphunculus array of high-sequential; By obtained sample washes of absolute alcohol, drying for standby.
(2) electro-deposition method prepares the nano titania siphunculus array of loaded copper oxide: the nano titania siphunculus array prepared with step (1) is for negative pole, and platinized platinum is to electrode, at 0.01mol/LCuSO
4electro-deposition 5min under 4V constant-pressure conditions in solution, then 400 DEG C of temperature lower calcination 2h in atmosphere, obtain the nano titania siphunculus array of loaded copper oxide.
(the 431mAhg of capacity first of the nano titania siphunculus array electrode of loaded copper oxide
-1) compared to pure titinium dioxide nanometer siphunculus array electrode (151mAhg
-1) there is obvious lifting; After 30 circulations, the nano titania siphunculus array electrode discharge capacity of loaded copper oxide still remains on 136mAh/g, higher than the discharge capacity (125mAhg of pure titinium dioxide nanometer siphunculus array electrode
-1).
Embodiment 3
(1) prepare nano titania siphunculus array: pure Ti sheet (thickness 0.2mm, purity 99.7%) is immersed successively acetone, absolute ethyl alcohol, deionized water for ultrasonic clean and remove surperficial grease in 10 minutes, and in drying box drying for standby; Make positive pole with pure Ti sheet, Pt sheet, as to electrode, is containing 0.25wt%NH
4the ethylene glycol organic solution of F, 5 hours are oxidized with constant voltage 20V, and powered-down after voltage-regulation being kept 10s to 60V at the end of anodic oxidation, remove Nano tube array of titanium dioxide bottom barrier, obtain the nano titania siphunculus array of high-sequential; By obtained sample washes of absolute alcohol, drying for standby.
(2) electro-deposition method prepares the nano titania siphunculus array of loaded copper oxide: the nano titania siphunculus array prepared with step (1) is for negative pole, and platinized platinum is to electrode, at 0.005mol/LCuSO
4electro-deposition 10min under 3V constant-pressure conditions in solution, then 500 DEG C of temperature lower calcination 1h in atmosphere, obtain the nano titania siphunculus array of loaded copper oxide.
(the 461mAhg of capacity first of the nano titania siphunculus array electrode of loaded copper oxide
-1) compared to pure titinium dioxide nanometer siphunculus array electrode (146mAhg
-1) there is obvious lifting; After 30 circulations, the nano titania siphunculus array electrode discharge capacity of loaded copper oxide still remains on 127mAh/g, higher than the discharge capacity (119mAhg of pure titinium dioxide nanometer siphunculus array electrode
-1).
Embodiment 4
(1) prepare nano titania siphunculus array: pure Ti sheet (thickness 0.1mm, purity 99.9%) is immersed successively acetone, absolute ethyl alcohol, deionized water for ultrasonic clean and remove surperficial grease in 10 minutes, and in drying box drying for standby; Make positive pole with pure Ti sheet, Pt sheet, as to electrode, is containing 0.5wt%NaF and 0.2mol/L (NH
4)
2sO
4the aqueous solution in, be oxidized 2 hours with constant voltage 20V, and at the end of anodic oxidation, voltage-regulation kept powered-down after 5s to 60V, remove Nano tube array of titanium dioxide bottom barrier, obtain the nano titania siphunculus array of high-sequential; By obtained sample washed with de-ionized water, drying for standby.
(2) electro-deposition method prepares the nano titania siphunculus array of loaded copper oxide: the nano titania siphunculus array prepared with step (1) is for negative pole, and platinized platinum is to electrode, at 0.02mol/LCu (NO
3)
2electro-deposition 5min under 3V constant-pressure conditions in solution, then 450 DEG C of temperature lower calcination 3h in atmosphere, obtain the nano titania siphunculus array of loaded copper oxide.
(the 426mAhg of capacity first of the nano titania siphunculus array electrode of loaded copper oxide
-1) compared to pure titinium dioxide nanometer siphunculus array electrode (127mAhg
-1) there is obvious lifting; After 30 circulations, the nano titania siphunculus array electrode discharge capacity of loaded copper oxide still remains on 120mAh/g, higher than the discharge capacity (105mAhg of pure titinium dioxide nanometer siphunculus array electrode
-1).
Embodiment 5
(1) prepare nano titania siphunculus array: pure Ti sheet (thickness 0.1mm, purity 99.9%) is immersed successively acetone, absolute ethyl alcohol, deionized water for ultrasonic clean and remove surperficial grease in 10 minutes, and in drying box drying for standby; Make positive pole with pure Ti sheet, Pt sheet, as to electrode, is containing 0.5wt%KF and 0.2mol/LNa
2sO
4the aqueous solution in, be oxidized 1.5 hours with constant voltage 40V, and at the end of anodic oxidation, voltage-regulation kept powered-down after 7s to 80V, remove Nano tube array of titanium dioxide bottom barrier, obtain the nano titania siphunculus array of high-sequential; By obtained sample washed with de-ionized water, drying for standby.
(2) electro-deposition method prepares the nano titania siphunculus array of loaded copper oxide: the nano titania siphunculus array prepared with step (1) is for negative pole, and platinized platinum is to electrode, at 0.005mol/LCuCl
2electro-deposition 3min under 5V constant-pressure conditions in solution, then 500 DEG C of temperature lower calcination 1h in atmosphere, obtain the nano titania siphunculus array of loaded copper oxide.
(the 363mAhg of capacity first of the nano titania siphunculus array electrode of loaded copper oxide
-1) compared to pure titinium dioxide nanometer siphunculus array electrode (124mAhg
-1) there is obvious lifting; After 30 circulations, the nano titania siphunculus array electrode discharge capacity of loaded copper oxide still remains on 103mAhg
-1, higher than the discharge capacity (99mAhg of pure titinium dioxide nanometer siphunculus array electrode
-1).
Claims (7)
1. a preparation method for the nano titania siphunculus array of loaded copper oxide, is characterized in that, specifically comprise the following steps:
(1) nano titania siphunculus array is prepared: also dry to titanium sheet cleaning, then with dried titanium sheet for positive pole, platinized platinum is to electrode, in the soluble-salt aqueous solution of fluoride ion or the organic solution of fluoride ion, 1 ~ 5h is oxidized with constant voltage 20 ~ 60V, and powered-down after voltage-regulation to 60 ~ 100V being kept 5 ~ 10s at the end of anodic oxidation, remove Nano tube array of titanium dioxide bottom barrier, obtain nano titania siphunculus array;
(2) electro-deposition method prepares the nano titania siphunculus array of loaded copper oxide: the nano titania siphunculus array prepared with step (1) is for negative pole, platinized platinum is to electrode, electro-deposition 3 ~ 10min under 3 ~ 5V constant-pressure conditions in the salting liquid of copper ions, then 400 ~ 500 DEG C of temperature lower calcination 2 ~ 4h in atmosphere, obtain the nano titania siphunculus array of loaded copper oxide.
2. the preparation method of the nano titania siphunculus array of loaded copper oxide according to claim 1, is characterized in that: described in step (1), the thickness of titanium sheet is 0.1 ~ 0.2mm, the purity of described titanium sheet is >=99.7%.
3. the preparation method of the nano titania siphunculus array of loaded copper oxide according to claim 1, is characterized in that: described in step (1) is NaF, KF or NH containing villiaumite
4f, the described soluble-salt aqueous solution is the H of 0.2 ~ 0.5mol/L
3pO
4, Na
2sO
4, (NH
4)
2sO
4or K
2sO
4solution, described organic solution is ethylene glycol, glycerol, diethylene glycol (DEG), formamide or dimethyl sulfoxide (DMSO).
4. the preparation method of the nano titania siphunculus array of loaded copper oxide according to claim 1, it is characterized in that: in the soluble-salt aqueous solution of the fluoride ion described in step (1), fluorine ion mass percent is 0.5 ~ 3%, in the organic solution of fluoride ion, fluorine ion mass percent is 0.25 ~ 0.5%.
5. the preparation method of the nano titania siphunculus array of loaded copper oxide according to claim 1, is characterized in that: the salt of the copper ions described in step (2) is CuSO
45H
2o, Cu (NO
3)
23H
2o or CuCl
22H
2o.
6. the preparation method of the nano titania siphunculus array of loaded copper oxide according to claim 1, is characterized in that: in the salting liquid of step (2) described copper ions, copper ion concentration is 0.005 ~ 0.02mol/L.
7. a lithium ion battery anode material, is characterized in that: required Nano tube array of titanium dioxide is the nano titania siphunculus array of the loaded copper oxide adopting the preparation method of the nano titania siphunculus array of the loaded copper oxide described in any one of claim 1 ~ claim 6 to prepare.
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| CN110474033A (en) * | 2019-08-22 | 2019-11-19 | 中南大学 | TiO2The preparation method and cathode of nano-array confinement antimony oxide cathode |
| CN112928257A (en) * | 2021-02-05 | 2021-06-08 | 华南理工大学 | Negative plate, preparation method thereof and lithium ion battery |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106784775A (en) * | 2017-01-19 | 2017-05-31 | 吉林大学 | The Cu of hollow Nano basket structure2O‑CuO‑TiO2The preparation method of composite |
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| CN110380044A (en) * | 2019-08-22 | 2019-10-25 | 中南大学 | Preparation method of titanium dioxide/antimony sulfide porous composite cathode of lithium ion battery |
| CN110474033A (en) * | 2019-08-22 | 2019-11-19 | 中南大学 | TiO2The preparation method and cathode of nano-array confinement antimony oxide cathode |
| CN112928257A (en) * | 2021-02-05 | 2021-06-08 | 华南理工大学 | Negative plate, preparation method thereof and lithium ion battery |
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