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A method for preparing supercapacitor electrode materials by co-electrodeposition

A supercapacitor and co-electrodeposition technology, which is applied in the field of materials science, can solve the problems that metal oxide capacitance cannot be applied very effectively, is unfavorable for industrial production and is not easy to composite, etc., and achieves excellent cycle stability and raw materials. The effect of low price and low equipment investment

Inactive Publication Date: 2015-12-02
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional mechanical mixing of metal oxides and conductive agents, binders, etc., which are widely used at present, is not easy to obtain extremely uniform composites. Therefore, the capacitive properties of metal oxides are still not very effective, which limits its performance. to play
Although it has recently been reported that uniform nanocomposites are prepared by in-situ polymerization of conductive polymers, the yield is low, the production cycle is long, and there is certain pollution, which is not conducive to industrial production.

Method used

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  • A method for preparing supercapacitor electrode materials by co-electrodeposition
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  • A method for preparing supercapacitor electrode materials by co-electrodeposition

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Select a stainless steel mesh with a thickness of about 50 μm, place it in a mixture of ethanol and acetone with a volume ratio of 1:1 and sonicate for 30 minutes, take it out and dry it as a current collector.

[0032] Manganese acetate is dissolved in water to prepare the manganese acetate solution of 0.1mol / L; The preparation mass percent concentration is 1% PEDOT:PSS solution, the solvent is water, and the mol ratio of PEDOT and PSS is 1:2; The manganese acetate solution is mixed with The PEDOT:PSS solution was thoroughly mixed according to the volume ratio of 20:0.1, and dispersed until transparent by ultrasonic to obtain the mother liquor of the mixture.

[0033] The current collector is used as the working anode, and the platinum electrode is used as the working cathode to insert the mother liquor of the mixture. The distance between the working anode and the working cathode is 1cm, and a DC voltage of 10V is applied for MnO 2 Electrodeposition and electrophoreti...

Embodiment 2

[0036] A stainless steel sheet with a thickness of about 10 μm was placed in a mixture of ethanol and acetone at a volume ratio of 1:1 for ultrasonic treatment for 10 minutes to remove the organic functional groups on the surface of the stainless steel sheet, and then dried as a current collector.

[0037] Dissolve manganese nitrate in water to prepare a 0.1mol / L manganese nitrate solution; use water as a solvent to prepare a PEDOT:PSS solution with a mass percentage concentration of 1%, and the molar ratio of PEDOT and PSS is 1:2, and the manganese nitrate solution Mix with PEDOT:PSS solution at a volume ratio of 20:0.2, and ultrasonically mix and disperse until the mixed solution is transparent and clear to obtain the mother liquor of the mixture.

[0038] The current collector is used as the working anode, and the gold electrode is used as the working cathode to insert the mixture mother liquor. The distance between the working anode and the working cathode is 1cm, and a 5V ...

Embodiment 3

[0041] Choose carbon nanotube paper as the current collector.

[0042] Manganese acetate is dissolved in water to prepare a 0.1mol / L manganese acetate solution; water is used as a solvent to prepare a PEDOT:PSS solution with a mass percent concentration of 1.5%, and the molar ratio of PEDOT and PSS is 1:3, and the manganese acetate solution is Mix with PEDOT:PSS solution at a volume ratio of 20:0.5, and ultrasonically mix and disperse until the mixed solution is blue and transparent to obtain the mother liquor of the mixture.

[0043] The current collector is used as the working anode, and the platinum electrode is used as the working cathode to insert the mother liquor of the mixture. The distance between the working anode and the working cathode is 0.8cm, and a 10V square wave voltage (its frequency is 20KHz, and the pulse width is 800μs) is applied for MnO 2 Electrodeposition and electrophoretic deposition of conductive polymer PEDOT:PSS. After the deposition, the current ...

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Abstract

The invention discloses a method for preparing a supercapacitor electrode material by means of coelectrodeposition. A current collector is prepared from a conductive material, the anodic electrodeposition of manganese dioxide and the anodic electrophoretic deposition of poly(3,4-ethylendioxythiophene)-poly(styrene sulfonic acid) are simultaneously carried out by means of coelectrodeposition, and a manganese dioxide / poly(3,4-ethylendioxythiophene)-poly(styrene sulfonic acid) deposition layer in a nanometer composite structure which is uniform in texture is formed on the surface of the current collector. According to the method disclosed by the invention, needed nanometer composite electrode materials can be prepared according to the requirements of different supercapacitors by regulating the process parameters and the proportions of the raw materials; the method is easy to achieve industrialized production; and the obtained electrode material has the characteristics of high specific capacity, excellent cycle stability and stable mechanical performance.

Description

technical field [0001] The invention belongs to the field of materials science, relates to electrochemical technology, in particular to a method for preparing supercapacitor electrode materials by co-electrodeposition. Background technique [0002] With the depletion of global mineral energy and the environmental problems caused by the use of mineral energy, the use of clean energy has become a hot spot of global concern. As a new type of energy storage device, supercapacitors have received extensive attention and research due to their advantages such as high power density and long cycle life. In recent years, as a new type of energy storage device, supercapacitors have been successfully applied in transportation tools, wireless communication equipment, power grids, consumer electronics industries and other fields. [0003] A supercapacitor, also called a pseudocapacitor, is a new type of energy storage device between a rechargeable battery and a capacitor, and has the char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/06C25D13/06H01G11/86
CPCY02E60/13
Inventor 杨诚苏滋津
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV