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Production method for conductive polymer modified active carbon electrode material of super capacitor

A conductive polymer and supercapacitor technology, applied in the direction of capacitor electrodes, capacitors, electrolytic capacitors, etc., can solve problems such as hindering the application, unsatisfactory stability of conductive polymer electrodes, etc., and achieve high conductivity and fast charge and discharge capabilities , the effect of good cycle stability

Inactive Publication Date: 2009-07-22
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the stability of conductive polymer electrodes is not satisfactory. At present, the cycle charge and discharge times of electrochemical capacitors made of it are only thousands of times, which hinders its application in production. Therefore, the stability of conductive polymer electrodes is improved. Cycle life is an important topic in the research of electrochemical capacitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) Preparation of A solution: adding methylpyrrole monomer to the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate to obtain A solution with a monomer concentration of 0.01mol / L;

[0015] 2) Add solution A to the electrolytic cell in which the reference electrode is a saturated calomel electrode, the counter electrode is a platinum sheet, and the working electrode is an activated carbon electrode, and apply 1mA / cm2 to the activated carbon electrode. 2 Electrochemical polymerization was carried out under the protection of nitrogen, and the polymerization time was 60 minutes. After the completion, a conductive polymer film with a thickness of 6 μm was obtained on the activated carbon working electrode.

Embodiment 2

[0017] 1) Preparation of A solution: adding methylpyrrole monomer to the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate to obtain A solution with a monomer concentration of 0.05mol / L;

[0018] 2) Add solution A to the electrolytic cell in which the reference electrode is a saturated calomel electrode, the counter electrode is a platinum sheet, and the working electrode is an activated carbon electrode, and apply 2mA / cm2 to the activated carbon electrode. 2 Electrochemical polymerization was carried out under the protection of nitrogen, and the polymerization time was 20 minutes. After the completion, a conductive polymer film with a thickness of 4 μm could be obtained on the activated carbon working electrode.

Embodiment 3

[0020] 1) Preparation of A solution: adding pyrrole monomer to the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate to obtain A solution with a monomer concentration of 0.05mol / L;

[0021] 2) Add solution A to the electrolytic cell in which the reference electrode is a saturated calomel electrode, the counter electrode is a platinum sheet, and the working electrode is an activated carbon electrode, and apply 5mA / cm2 to the activated carbon electrode. 2 Electrochemical polymerization was carried out under the protection of nitrogen, and the polymerization time was 60 minutes. After the completion, a conductive polymer film with a thickness of 28 μm was obtained on the activated carbon working electrode.

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Abstract

The invention relates to a preparation method for conductive polymer modification activated carbon electrode materials in a super capacitor, which comprises the following steps: conductive polymer monomers are added into ionic liquid to obtain A solution with the monomer concentration of 0.01-0.5mol / L; the A solution is added into an electrolytic cell deployed with three electrodes; ampere density of 1-10 mA / cm2 is applied to an activated carbon electrode; the electrochemical polymerization is carried out under the protection of nitrogen; after the polymerization is finished, a layer of even conduction polymer film can be obtained on an activated carbon working electrode. The preparation method has the beneficial effects that by using conductive polymer modification activated carbon electrodes, the double layer capacitance of the activated carbon not only can be used, but also the pseudo-capacitance of the conductive polymers can be used for increasing the specific capacitance of the capacitor; compared with a pure activated carbon electrode, the specific capacitance is increased by 2-3 times; and the electrode has high conductivity, fast charge and discharge capability and better circulation stability.

Description

technical field [0001] The invention relates to a preparation method of a class of electronic materials, in particular to a preparation method of a conductive polymer modified active carbon electrode material for a supercapacitor. Background technique [0002] With the rapid development of social economy, resources and energy are gradually in short supply, and human beings are increasingly dependent on clean and renewable new energy. In recent years, in addition to low cost and long service life, energy storage devices are expected to have higher energy density per unit volume or greater power density. Electrochemical supercapacitor, also known as supercapacitor, is a new type of energy storage device with the characteristics of fast storage and release of energy, so it has extremely important and broad application prospects in mobile communications, electric vehicles, aerospace and defense technology, etc. . Compared with traditional capacitors, electrochemical capacitors...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/042C01B31/08C25D13/08
CPCY02E60/13
Inventor 李亮江登榜曾小平郑磊胡双强
Owner WUHAN INSTITUTE OF TECHNOLOGY
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