CN107706382B - Flaky sodium-manganese oxide and preparation method and application thereof - Google Patents
Flaky sodium-manganese oxide and preparation method and application thereof Download PDFInfo
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- CN107706382B CN107706382B CN201710888897.XA CN201710888897A CN107706382B CN 107706382 B CN107706382 B CN 107706382B CN 201710888897 A CN201710888897 A CN 201710888897A CN 107706382 B CN107706382 B CN 107706382B
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- IKULXUCKGDPJMZ-UHFFFAOYSA-N sodium manganese(2+) oxygen(2-) Chemical compound [O-2].[Mn+2].[Na+] IKULXUCKGDPJMZ-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000002242 deionisation method Methods 0.000 claims abstract description 17
- 239000011572 manganese Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000001291 vacuum drying Methods 0.000 claims abstract description 11
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000000376 reactant Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000007772 electrode material Substances 0.000 claims description 9
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 239000006230 acetylene black Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000003011 anion exchange membrane Substances 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000010612 desalination reaction Methods 0.000 abstract description 10
- 239000013535 sea water Substances 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000003837 high-temperature calcination Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000001308 synthesis method 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
- H01M4/02—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
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- 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 discloses a flaky sodium-manganese oxide, a preparation method and application thereof, wherein the sodium-manganese oxide is Na 0.91 MnO 2, the preparation method comprises the steps of firstly mixing NaOH, H 2 O 2 and Mn (NO 3) 2 solutions to form a suspension, then transferring the suspension into a reaction kettle for sealing, placing the suspension into a vacuum drying oven for reaction at 100 ~ 200 ℃ for 12H ~ 20H, cooling to room temperature, taking out a reactant for washing and centrifuging for 3 times, and then placing the reactant into the vacuum drying oven for drying to obtain the flaky sodium-manganese oxide Na 0.91 MnO 2, preparing the prepared sodium-manganese oxide into an electrolytic cell of a mixed capacitance deionization device formed by an electrode and an active carbon electrode, and applying the electrolytic cell to seawater desalination.
Description
Technical Field
The invention relates to a sodium manganese oxide material, in particular to a flaky sodium manganese oxide and a preparation method and application thereof, belonging to the field of electrode materials.
Background
Among the new seawater desalination technologies developed in recent years, Capacitive Deionization (CDI) undoubtedly provides a new approach with low energy and high efficiency for seawater desalination that has been long explored by human beings. In recent years, based on CDI, in combination with a battery system, a Hybrid Capacitance Deionization (HCDI) technology is developed and researched to make up for the limitation of ion removal rate of the conventional CDI in high-concentration brine. Currently, the development direction of HCDI is mainly the preparation and modification of new electrodes. Therefore, the novel HCDI electrode material prepared by adopting a simple, economic and efficient synthesis method can bring great economic and social benefits to the development of the capacitive deionization technology.
The electrode material in the mixed capacitance deionization technology has the following three defects: first, the raw materials are expensive. For example, in the production of a metal compound electrode such as a lithium electrode in the hybrid capacitor deionization technology, it is known that a lithium compound or the like as a raw material is generally expensive. Secondly, the manufacturing process is complicated and the power consumption is large. The preparation of electrode materials for the mixed capacitance deionization technology mostly adopts a high-temperature calcination mode, which not only increases the economic cost, but also has a very complicated post-treatment mode and relatively low yield. Thirdly, the application area is small. Some electrodes made by mixed capacitance deionization are applied in a few aspects, such as lithium batteries, and can only be applied to supercapacitors generally.
disclosure of Invention
the technical problem to be solved is as follows: aiming at the defects of high material transportation price, high power consumption, complex preparation process, narrow application range and the like in the prior art, the invention provides a flaky sodium-manganese oxide and a preparation method and application thereof.
the technical scheme is that the flaky sodium manganese oxide provided by the invention has a structural formula of Na 0.91 MnO 2, is a nanoscale gray uniform flaky structure, and has a particle size of 30 ~ 100 nm.
the invention provides a preparation method of a flaky sodium-manganese oxide, which is characterized by comprising the following preparation steps:
(1) Adding a mixed solution consisting of NaOH with the concentration of 0.2mol/L ~ 1.0.0 mol/L and H 2 O 2 with the concentration of 1mol/L ~ 3mol/L into Mn (NO 3) 2 solution with the concentration of 0.1mol/L ~ 0.3.3 mol/L to form a suspension, wherein the volume ratio of the NaOH solution to the H 2 O 2 solution to the Mn (NO 3) 2 solution is (2 ~ 3): (9 ~ 11): 1;
(2) And (2) transferring the suspension generated in the step (1) into a reaction kettle, sealing, putting the reaction kettle into a vacuum drying oven to react for 12h ~ 20h at 100 ~ 200 ℃, cooling to room temperature, taking out the reactant, washing and centrifuging for 3 times, wherein the centrifuging time is 3 ~ 6min each time, putting the reaction kettle into the vacuum drying oven to dry for 6 ~ 10h at 100 ~ 160 ℃ for 6 0.91 MnO 2, and the centrifuging speed is 8000 ~ 10000 r/min.
The flaky sodium manganese oxide provided by the invention is applied to an electrode material of a mixed capacitance deionization device.
the method for applying the flaky sodium manganese oxide to the electrode material of the mixed capacitance deionization device comprises the following steps:
(1) Grinding sodium manganese oxide into powder of 50nm, mixing the powder with acetylene black and polyvinylidene fluoride according to the mass ratio of (13 ~ 15): 4 ~ 6):1 to obtain a mixture, then adding the mixture into n-methyl pyrrolidone, and stirring for 2 ~ 8h to obtain a slurry mixture, wherein the mass ratio of the mixture to the n-methyl pyrrolidone is 1: (5 ~ 6), and the concentration of the n-methyl pyrrolidone is 2 ~ 7%;
(2) coating the slurry mixture obtained in the step (1) on a graphite paper sheet, and drying in a vacuum drying oven at 80 ~ 160 ℃ for 8 ~ 16h to obtain a sodium manganese oxide electrode sheet;
(3) Mixing activated carbon, acetylene black and polytetrafluoroethylene according to the mass ratio of (13 ~ 15): (4 ~ 6):1 to prepare a sheet, sticking the sheet to a graphite paper sheet, and drying at the temperature of 20 ~ 100 ℃ to obtain an activated carbon electrode sheet;
(4) And (3) taking the sodium manganese oxide electrode slice obtained in the step (2) as a positive electrode, taking the activated carbon electrode slice obtained in the step (3) as a negative electrode, adding an insulating gasket and an anion exchange membrane in the middle to fix the distance between the positive electrode slice and the negative electrode slice to be 2 ~ 3mm, and manufacturing the electrolytic cell of the mixed capacitor deionization device.
Has the advantages that: (1) the preparation of the sodium manganese oxide adopts a hydrothermal synthesis method, the raw material price is low, the process is simple, the yield is relatively high, the obtained sodium manganese oxide is very stable, the specific capacitance can reach 120mAh/g, the electrochemical window is wider, the pseudocapacitance performance is obviously presented, and the capacitance of the sheet SMO is about 250-350F/g.
(2) the sodium manganese oxide has good application in a mixed capacitance deionization (HCDI) technology, has excellent sodium ion capture capacity, long cycle service life, capability of circulating for more than 1000 circles, low cost, good quality, extremely low energy consumption and desalination rate of 10mg/g ~ 25 mg/g.
(3) The sodium manganese oxide can be used for seawater desalination, can be assembled into a device, is applied to carrying and transportation, has wide application prospect in military and civil use, or is widely applied to the desalination of brackish water and the treatment of heavy metal-containing water, and has great social benefit and wide market prospect.
Drawings
FIGS. 1 (A) and 1 (B) are SEM images of the sodium manganese oxide material of example 1;
FIG. 2 is a CV diagram of a sodium manganese oxide electrode and an activated carbon electrode of example 1;
FIG. 3 is a graph showing the charge and discharge curves of the sodium manganese oxide electrode and the activated carbon electrode of example 1;
FIG. 4 is a graph of the stability of the sodium manganese oxide electrode and the activated carbon electrode of example 1;
FIG. 5 is an XRD pattern of the sodium manganese oxide electrode of example 1;
FIG. 6 is a CV diagram for the two-electrode system of example 1;
FIG. 7 is a graph of the charge and discharge curves of the two-electrode system of example 1;
FIG. 8 is a graph of the stability of the two-electrode system of example 1.
Detailed Description
The technical solutions of the present invention are further illustrated by the following examples, but the scope of the present invention is not limited to the following examples, but is defined by the description of the present invention and the claims.
example 1
Firstly, the production area and the equipment are ensured to be clean and dry, and the used utensils are cleaned and sterilized. The method for preparing the flaky sodium manganese oxide comprises the following steps:
Adding a mixed solution consisting of NaOH with the concentration of 0.6mol/L and 2mol/L H 2 O 2 into Mn (NO 3) 2 solution with the concentration of 0.3mol/L, wherein the volume ratio of the three solutions is 2:10:1, transferring the generated suspension into a reaction kettle, sealing, putting the reaction kettle into a vacuum drying box, reacting for 16 hours at the temperature of 150 ℃, cooling to room temperature, taking out, washing with water, centrifuging for 3 times, wherein the rotating speed of each time is 10000r/min, the centrifuging time is 3min, and then putting into the vacuum drying box to dry for 10 hours at the temperature of 105 ℃, thus obtaining Na 0.91 MnO 2;
Mixing sodium manganese oxide powder with acetylene black and polyvinylidene fluoride according to a mass ratio of 70:25:5 to obtain a mixture, adding the mixture into n-methyl pyrrolidone, and stirring for 2 hours to obtain a slurry mixture; the mass ratio of the mixture to the n-methylpyrrolidone is 1: 6; coating the obtained slurry mixture on graphite paper, and drying the graphite paper coated with the slurry mixture in a vacuum drying oven at 120 ℃ for 12 hours to obtain a sodium manganese oxide electrode; mixing activated carbon, acetylene black and polytetrafluoroethylene in a mass ratio of 70:25:5 to prepare a sheet, adhering the sheet to graphite paper, and drying at the temperature of 60 ℃ to obtain an activated carbon electrode; the sodium manganese oxide electrode slice is used as a positive electrode, and the active carbon electrode slice is used as a negative electrode to assemble a double electrode for testing the performance of the double electrode.
It can be seen from fig. 1A and 1B that the sodium manganese oxide is a uniform nano sheet-like structure, the CV diagram of fig. 2 has an obvious redox peak showing good symmetry, the rest part shows a large rectangle except the redox peak, and has a wide electrochemical window, indicating that the nano SMO obviously shows pseudocapacitance performance, in fig. 3, a tiny discharge platform appears in a tested voltage interval, and is matched with the previous CV diagram, and is a typical faraday capacitance reaction, the capacitance of the sheet SMO is 300F/g, fig. 4 reflects that the sodium manganese oxide is very stable and has a high specific capacitance of 120mAh/g, fig. 5 shows that the substance is just the sodium manganese oxide Na 0.91 MnO 2, fig. 6, 7, and 8 show that the sodium manganese oxide Na 0.91 2 has good properties and high stability after being combined into a double electrode, and the electrochemical window in the CV diagram is wide, and the symmetry is good, and the sodium manganese oxide can be applied to mixed capacitance deionization devices, and can be used for desalination of seawater with a desalination cycle life cycle of more than 1000 mg and a cycle of desalination of 1000 mg.
Example 2
The basic steps are the same as example 1, except that the volume ratio of three solutions of NaOH, H 2 O 2 and Mn (NO 3) 2 is 3:10: 1. when the rest conditions are not changed, the volume ratio of the mixture of NaOH, H 2 O 2 and Mn (NO 3) 2 is changed to 3:10:1, and the test result shows that the electrochemical performance of the sodium manganese oxide is still the original substance, but the oxidation peak and the reduction peak shown in a CV diagram are not obvious and have insufficient symmetry, but the electrode has higher stability, and the specific discharge capacity is stabilized at 90 mAh/g.
Example 3
the basic steps are the same as example 1, except that the volume ratio of NaOH, H 2 O 2 and Mn (NO 3) 2 is 2.5:10: 1. when the rest conditions are not changed, the volume ratio of the mixture of NaOH, H 2 O 2 and Mn (NO 3) 2 is changed to 2.5:10:1, and the test result shows that the sodium manganese oxide is not changed, the electrochemical performance is better, namely, a CV diagram shows a milder oxidation peak and reduction peak, although the symmetry is not as good as that of example 1, the electrode stability is better through the charge-discharge test, and the specific discharge capacity is stabilized at 100 mAh/g.
Example 4
The basic steps are the same as example 1, except that the volume ratio of NaOH, H 2 O 2 and Mn (NO 3) 2 is 2.7:10: 1. when the rest conditions are not changed, the volume ratio of the mixture of NaOH, H 2 O 2 and Mn (NO 3) 2 is changed to 2.7:10:1, and the test result shows that the sodium manganese oxide is not changed, but the form is slightly changed, the displayed color is bright, the electrochemical performance is general, a CV diagram shows that the electrochemical window is narrow, the electrode stability is good, the discharge specific capacitance is stabilized at 95mAh/g, and the desalination rate reaches 12 mg/g.
example 5
The basic steps are the same as example 1, except that the volume ratio of NaOH, H 2 O 2 and Mn (NO 3) 2 is 2:9:1, when the rest conditions are not changed, the volume ratio of the mixture of NaOH, H 2 O 2 and Mn (NO 3) 2 is changed to 2:9:1, and the test result shows that sodium manganese oxide is not changed, the CV diagram shows obvious oxidation peak and reduction peak, and has symmetry, but the electrochemical window is too small, but the electrode has higher stability.
Comparative example 1
The basic procedure is the same as in example 1, except that: when the sodium manganese oxide is prepared, the hydrothermal synthesis method is replaced by a high-temperature calcination method. As can be seen from performance tests of the composite electrode prepared by the method, when a high-temperature calcination method is adopted, the temperature setting is higher, the internal structure of the sodium manganese oxide is changed, the electrochemical performance is poorer, an oxidation peak and a reduction peak shown by a CV diagram are not obvious, the symmetry is better, but the electrochemical window is smaller, the stability is poorer, the specific capacitance can only reach 50mAh/g, and the salt rejection rate finally tested only reaches 5 mg/g.
Claims (5)
1. the flaky sodium manganese oxide is characterized in that the structural formula of the sodium manganese oxide is Na 0.91 MnO 2, the flaky sodium manganese oxide is a nanoscale gray uniform flaky structure, the particle size is 30 ~ 100nm, and the preparation method of the sodium manganese oxide comprises the following steps:
(1) Adding a mixed solution consisting of NaOH with the concentration of 0.2mol/L ~ 1.0.0 mol/L and H 2 O 2 with the concentration of 1mol/L ~ 3mol/L into Mn (NO 3) 2 solution with the concentration of 0.1mol/L ~ 0.3.3 mol/L to form a suspension, wherein the volume ratio of the NaOH solution to the H 2 O 2 solution to the Mn (NO 3) 2 solution is (2 ~ 3): (9 ~ 11): 1;
(2) And (2) transferring the suspension generated in the step (1) to a reaction kettle, sealing, placing the reaction kettle in a vacuum drying oven to react at 100 ~ 200 ℃ for 12h ~ 20h, cooling to room temperature, taking out the reactant, washing with water, centrifuging for 3 times, wherein the centrifuging time is 3 ~ 6min each time, and then placing the reaction kettle in the vacuum drying oven to dry at 100 ~ 160 ℃ for 6 ~ 10h to obtain the flaky sodium manganese oxide Na0 .91 MnO 2.
2. The flaky sodium manganese oxide according to claim 1, characterized in that the centrifugal rotation speed is 8000 ~ 10000 r/min.
3. The use of the flaky sodium manganese oxide of claim 1 as an electrode material for a mixed capacitance deionization apparatus.
4. The method for applying the flaky sodium manganese oxide to the electrode material of the mixed capacitance deionization device according to claim 3 comprises the following steps:
(1) Grinding sodium manganese oxide into powder of 50nm, mixing the powder with acetylene black and polyvinylidene fluoride according to the mass ratio of (13 ~ 15): 4 ~ 6):1 to obtain a mixture, then adding the mixture into n-methyl pyrrolidone, and stirring for 2 ~ 8h to obtain a slurry mixture, wherein the mass ratio of the mixture to the n-methyl pyrrolidone is 1: (5 ~ 6);
(2) Coating the slurry mixture obtained in the step (1) on a graphite paper sheet, and drying in a vacuum drying oven at 80 ~ 160 ℃ for 8 ~ 16h to obtain a sodium manganese oxide electrode sheet;
(3) mixing activated carbon, acetylene black and polytetrafluoroethylene according to the mass ratio of (13 ~ 15): (4 ~ 6):1 to prepare a sheet, sticking the sheet to a graphite paper sheet, and drying at the temperature of 20 ~ 100 ℃ to obtain an activated carbon electrode sheet;
(4) And (3) taking the sodium manganese oxide electrode slice obtained in the step (2) as a positive electrode, taking the activated carbon electrode slice obtained in the step (3) as a negative electrode, adding an insulating gasket and an anion exchange membrane in the middle to fix the distance between the positive electrode slice and the negative electrode slice to be 2 ~ 3mm, and manufacturing the electrolytic cell of the mixed capacitor deionization device.
5. The method for applying the flaky sodium manganese oxide to the electrode material of the mixed capacitance deionization device according to claim 4, wherein the concentration of the n-methylpyrrolidone in the step (1) is 2 ~ 7%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065806A (en) * | 2013-01-31 | 2013-04-24 | 武汉理工大学 | Sodion-embedded manganese dioxide nanometer sheet electrode as well as preparation method and application of electrode |
| CN104828869A (en) * | 2015-05-08 | 2015-08-12 | 湖南汇通科技有限责任公司 | Sodium manganese oxide micro-powder and preparation method thereof |
| CN105990043A (en) * | 2015-03-02 | 2016-10-05 | 江南石墨烯研究院 | Preparation method of efficient porous thin film electrode used for capacitive deionization |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065806A (en) * | 2013-01-31 | 2013-04-24 | 武汉理工大学 | Sodion-embedded manganese dioxide nanometer sheet electrode as well as preparation method and application of electrode |
| CN105990043A (en) * | 2015-03-02 | 2016-10-05 | 江南石墨烯研究院 | Preparation method of efficient porous thin film electrode used for capacitive deionization |
| CN104828869A (en) * | 2015-05-08 | 2015-08-12 | 湖南汇通科技有限责任公司 | Sodium manganese oxide micro-powder and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| "Hybrid capacitive deionization to enhance the desalination performance of capacitive techniques";Jaehan Lee, et al.;《Energy Environ. Sci.》;20140820;第7卷;第3683-3689页 * |
| "Sodium Manganese Oxide Nanobelts with a 2 × 4 Tunnel Structure: One-Step Hydrothermal Synthesis and Electrocatalytic Properties";Xiong Zhang, et al.;《J. Nanosci. Nanotechnol.》;20091231;第9卷;第5860-5864页 * |
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Inventor after: Dan Yuanyuan Inventor after: Teng Teng Inventor after: Sha Chunfan Inventor after: Gu Leixiang Inventor after: Ge Chichao Inventor after: Hu Ronghua Inventor before: Teng Teng Inventor before: Sha Chunfan Inventor before: Gu Leixiang Inventor before: Ge Chichao Inventor before: Hu Ronghua Inventor before: Dan Yuanyuan |