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Method for preparing composite conductive high molecular electrode material in use for super capacitor

A polymer electrode and supercapacitor technology, applied in capacitors, electrolytic capacitors, circuits, etc., can solve problems such as poor cycle performance and lower specific capacity, and achieve high specific capacity, high specific capacity, and good cycle stability.

Inactive Publication Date: 2006-04-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conductive polymer materials are another new type of redox-type supercapacitor electrode materials with high theoretical specific capacity (polyethylenedioxythiophene: 210F / g, polypyrrole: 620F / g, polyaniline: 750F / g) , but poor cycle performance
In order to improve its cycle performance, researchers have used activated carbon or carbon nanotubes to modify conductive polymer materials, but this method will reduce its specific capacity.

Method used

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  • Method for preparing composite conductive high molecular electrode material in use for super capacitor
  • Method for preparing composite conductive high molecular electrode material in use for super capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1: 1) Preparation of A solution: first add lithium chloride to water and make the concentration of lithium chloride be the electrolytic solution of 0.1mol / l, then add hydrochloric acid in electrolytic solution and adjust the pH of electrolytic solution to be 3, obtain A solution;

[0015] 2) Preparation of solution B: add pyrrole monomer to solution A to prepare solution B with a concentration of pyrrole monomer of 0.1 mol / l;

[0016] 3) Insert a stainless steel mesh into the B solution as a working electrode and a stainless steel tank as a counter electrode to carry out electrochemical polymerization, and the polymerization current density is 20mA / cm 2 , the polymerization time is 1 minute; after the polymerization is completed, polypyrrole is formed on the surface of the working electrode, the working electrode and the counter electrode are taken out, washed, and dried at 60°C;

[0017] 4) Preparation of solution C: add aniline to solution A so that the co...

Embodiment 2

[0019] Embodiment 2: 1) Preparation of A solution: first add sodium chloride to the methanol solution so that the concentration of sodium chloride is an electrolyte solution of 0.6mol / l, then add hydrochloric acid corresponding to the electrolyte to adjust the electrolyte solution in the electrolyte solution The pH of is 4, obtains A solution;

[0020] 2) Preparation of solution B: add pyrrole monomer to solution A to prepare solution B with a concentration of pyrrole monomer of 0.9 mol / l;

[0021] 3) Then insert nickel mesh into the B solution as the working electrode and graphite plate as the counter electrode for electrochemical polymerization, and the polymerization current density is 15mA / cm 2 , the polymerization time is 20 minutes; after the polymerization is completed, polypyrrole is formed on the surface of the working electrode, the working electrode and the counter electrode are taken out, washed, and dried at 75°C;

[0022] 4) Preparation of solution C: adding eth...

Embodiment 3

[0024] Embodiment 3: 1) Preparation of A solution: first add potassium chloride to the propylene carbonate solution so that the concentration of potassium chloride is an electrolyte solution of 0.3mol / l, then add hydrochloric acid corresponding to the electrolyte in the electrolyte solution to adjust The pH of the electrolyte solution is 5, and A solution is obtained;

[0025] 2) Preparation of solution B: add pyrrole monomer to solution A to prepare solution B with a concentration of pyrrole monomer of 1 mol / l;

[0026] 3) Insert a stainless steel mesh into the B solution as a working electrode and a graphite plate as a counter electrode to carry out electrochemical polymerization, and the polymerization current density is 10mA / cm 2 , the polymerization time is 15 minutes; after the polymerization is completed, polypyrrole is formed on the surface of the working electrode, the working electrode and the counter electrode are taken out, washed, and dried at 80°C;

[0027] 4) P...

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Abstract

An electrically conductive composite high-molecular electrode material used for super capacitor is prepared through using pyrrole monomer to form polypyrrole on working electrode. It features the synergestic effect between polypyrrole and the polymer of phenylamine, vinyldioxy thiophene and p-phenylene, resulting in high specific capacitance (200 F / g) and wide potential window (0-1.2 V for aqueous solution and 0-3 V for organic solvent).

Description

technical field [0001] The invention relates to a method for preparing an electronic material, in particular to a method for preparing a composite conductive polymer electrode material for a supercapacitor. technical background [0002] Supercapacitors are mainly divided into electric double layer supercapacitors and redox supercapacitors. The specific capacitance of an electric double layer supercapacitor is mainly determined by the surface area of ​​the electrode material, and its theoretical capacitance is proportional to the specific surface area of ​​the electrode material. At present, the specific surface area is mainly increased by using activated carbon or carbon nanotubes as electrode materials, and its specific capacity is about 50F / g-150F / g. The electrode materials of common redox supercapacitors are generally metal oxides (such as RuO 2 ), its capacity comes from the rapid oxidation-reduction reaction of the electroactive substance on the surface or inside of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/14C08G83/00H01G9/042
CPCY02E60/13
Inventor 徐友龙王杰孙伟
Owner XI AN JIAOTONG UNIV
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