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Method of preparing poly-pyrrole/polythiofuran derivative composite conductive macromolecule material for super electrical condenser

A technology of polythiophene derivatives and supercapacitors, which is applied to capacitor electrodes and capacitor parts, etc., can solve the problems of small dopant molecules and affect the cycle stability of membrane electrode capacitance, and achieve high specific capacity and good cycle stability Effect

Inactive Publication Date: 2009-07-29
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the dopant molecules are often relatively small, they are easy to diffuse out of the single-layer conductive polymer film, which affects the cycle stability of the membrane electrode capacitance.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0016] 1) Preparation of A solution: first mix boron trifluoride diethyl ether and diethyl ether according to a volume ratio of 5:1, then add ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate to it to obtain 1- Butyl-3-methylimidazolium tetrafluoroborate concentration is A solution of 0.05mol / L;

[0017] 2) Preparation of solution B: adding pyrrole and thiophene monomers to solution A, respectively, to prepare solution B with pyrrole and thiophene monomer concentrations of 0.05mol / L and 1mol / L, respectively;

[0018] 3) In a three-electrode electrolytic cell equipped with a saturated calomel electrode as a reference electrode, a platinum sheet as a counter electrode, and a stainless steel sheet as a working electrode, add solution B to carry out electrochemical polymerization under nitrogen protection, and the polymerization current density is 1mA / cm 2 , the polymerization time is 30min. After completion, a layer of polypyrrole / polythiophene composite film with a thic...

Embodiment 2

[0020] 1) Preparation of A solution: first mix boron trifluoride diethyl ether and diethyl ether according to a volume ratio of 5:1, then add ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate to it to obtain 1- Butyl-3-methylimidazolium tetrafluoroborate concentration is A solution of 0.2mol / L;

[0021] 2) Preparation of solution B: add pyrrole and thiophene monomers to solution A, respectively, to prepare B solutions with concentrations of pyrrole and thiophene monomers of 0.2 mol / L and 1 mol / L;

[0022] 3) In a three-electrode electrolytic cell equipped with a saturated calomel electrode as a reference electrode, a platinum sheet as a counter electrode, and a stainless steel sheet as a working electrode, add solution B to carry out electrochemical polymerization under nitrogen protection, and the polymerization current density is 1mA / cm 2 , the polymerization time is 60min, and a layer of polypyrrole / polythiophene composite film with a thickness of 6 μm can be obtai...

Embodiment 3

[0024] 1) Preparation of A solution: first mix boron trifluoride diethyl ether and diethyl ether according to a volume ratio of 3:1, and then add ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate to it to obtain 1- Butyl-3-methylimidazolium tetrafluoroborate concentration is A solution of 0.5mol / L;

[0025] 2) Preparation of solution B: add pyrrole and thiophene monomers to solution A, respectively, to prepare solution B with concentrations of pyrrole and thiophene monomers of 0.5 mol / L and 0.8 mol / L;

[0026] 3) In a three-electrode electrolytic cell equipped with a saturated calomel electrode as a reference electrode, a platinum sheet as a counter electrode, and a stainless steel sheet as a working electrode, add solution B to carry out electrochemical polymerization under nitrogen protection, and the polymerization current density is 4mA / cm 2 , the polymerization time is 50min. After completion, a layer of polypyrrole / polythiophene composite film with a thickness o...

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Abstract

The invention relates to a preparation method for polypyrrole / polythiophene derivative compound conductive high polymer material, which comprises the following steps: firstly, boron trifluoride diethyl ether and aether are blended, and then added with ionic liquid to obtain A solution; pyrrole and thiofuran derivative monomer are added into the A solution to prepare B solution; the B solution is added into an electrolytic cell equipped with three electrodes; and electrochemical polymerization is carried out under the protection of nitrogen; polymerized current density is 1-10 mA / cm2; a layer of uniform polypyrrole / polythiophene derivative complex film can be obtained on a working electrode after polymerization is finished; the working electrode is taken out for washing and dried in the temperature of 60 DEG C. The preparation method has the beneficial effects that the composite electrode material prepared by the invention has about 200 F / g of bulking value and an electrical potential widow with about 0-2.8 width in organic solvent, and still has higher specific capacity and better circulation stability when discharging in high power.

Description

technical field [0001] The invention relates to a method for preparing a polypyrrole / polythiophene derivative composite conductive polymer material for a supercapacitor. Background technique [0002] Electrochemical supercapacitor, also known as supercapacitor, is a new type of energy storage device. It is a new type of energy storage device between traditional capacitors and batteries. It has the characteristics of fast storage and release of energy. Technology, industry, consumer electronics, electric vehicles, aerospace and defense technology have extremely important and broad application prospects. Compared with traditional capacitors, electrochemical capacitors have higher specific capacity, and the specific energy that can be stored is 10-100 times that of traditional capacitors; compared with batteries, they have higher specific power, shorter charging time, and higher discharge efficiency. Long cycle life and other advantages. The electrical energy stored in electr...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08G61/12C08G73/06C08L65/00C08L79/04H01G9/04
CPCY02E60/13
Inventor 李亮李强曾小平柯贞将黄瑜江登榜
Owner WUHAN INSTITUTE OF TECHNOLOGY
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