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Method for preparing polyaniline/manganese dioxide composite material for super capacitor

A supercapacitor, manganese dioxide technology, used in the manufacture of hybrid/electric double layer capacitors, capacitors, electrolytic capacitors, etc., can solve problems such as poor capacitance and cycle stability, limited material conductivity, and high requirements for production equipment, achieving high performance. Specific capacitance, simplified follow-up processing, less demanding effects

Inactive Publication Date: 2010-04-21
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chen Jianding and others also mixed the acidic aqueous solution of aniline monomer and the acidic aqueous solution of the oxidizing agent, then reacted the mixture with manganese dioxide or the acidic aqueous suspension of manganese dioxide, and prepared the conductive polyaniline / manganese dioxide composite material ( Chinese invention patent, CN1446855A), the synthetic method of this invention is simple and easy, is to mix the particle of polyaniline and manganese dioxide, but in the above-mentioned method, the manganese dioxide that permanganate reduction generates and the polyaniline after aniline oxidation The composite is not uniform enough, which leads to the limitation of the conductivity of the material, and when it is used as a supercapacitor electrode material, the specific capacitance and cycle stability are also poor; moreover, the above preparation method has high requirements for production equipment and complicated operation

Method used

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  • Method for preparing polyaniline/manganese dioxide composite material for super capacitor
  • Method for preparing polyaniline/manganese dioxide composite material for super capacitor
  • Method for preparing polyaniline/manganese dioxide composite material for super capacitor

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) oxidant potassium permanganate of 0.02mol is dissolved in 100ml water, is made into solution A;

[0035] (2) Dissolve 5ml of aniline monomer in 100ml of 1mol / L hydrochloric acid to form solution B;

[0036] (3) Slowly add solution A to solution B, control the rate of addition, and keep stirring, and react at a constant temperature of 30°C for 6 hours;

[0037] (4) filter the reaction product, and repeatedly wash the product with deionized water and acetone until the filtrate is colorless;

[0038] (5) The washed product was vacuum-dried at 60° C. for 24 h and then ground to obtain a polyaniline / manganese dioxide composite material. It can be calculated that its specific capacitance as a supercapacitor electrode material is 475F / g, and a good cyclic voltammogram ( figure 1 , 2 , 3).

Embodiment 2

[0040] (1) oxidant potassium permanganate of 0.02mol is dissolved in 100ml water, is made into solution A;

[0041] (2) Dissolve 7.47ml of aniline monomer in 100ml of 1mol / L hydrochloric acid to form solution B;

[0042] (3) Slowly add solution A to solution B, control the rate of addition, and keep stirring, and react at a constant temperature of 30°C for 6 hours;

[0043] (4) filter the reaction product, and repeatedly wash the product with deionized water and acetone until the filtrate is colorless;

[0044] (5) The washed product was vacuum-dried at 60° C. for 24 h and then ground to obtain a polyaniline / manganese dioxide composite material. XRD test shows that the manganese dioxide in the composite material is amorphous structure.

Embodiment 3

[0046] (1) oxidant potassium permanganate of 0.02mol is dissolved in 100ml water, is made into solution A;

[0047] (2) Dissolve 5ml of aniline monomer in 100ml of 1mol / L hydrochloric acid to form solution B;

[0048] (3) Slowly add solution A to solution B, control the rate of addition, and keep stirring, and react at a constant temperature of 0°C for 6 hours;

[0049] (4) filter the reaction product, and repeatedly wash the product with deionized water and acetone until the filtrate is colorless;

[0050] (5) The washed product was vacuum-dried at 60° C. for 24 h and then ground to obtain a polyaniline / manganese dioxide composite material. The content of manganese dioxide in the composite obtained by chemical analysis is 8.5%

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Abstract

The invention discloses a method for preparing a polyaniline / manganese dioxide composite material for a super capacitor, which adopts permanganate as an oxidizer to oxidize aniline to directly obtain the polyaniline / manganese dioxide composite material. The method can ensure the contact of manganese dioxide and polyaniline at molecular level by oxidizing the aniline by the permanganate, has no an impurity phase after a reaction at the same time, and simplifies subsequent treatment work. The method for preparing the polyaniline / manganese dioxide composite material for the super capacitor has the advantages of simple process, convenient operation and convenient control, ensures that the electric conductivity of the prepared polyaniline / manganese dioxide composite material is effectively improved, and is suitable for mass industrial production.

Description

technical field [0001] The invention relates to the field of preparation of electrode materials for supercapacitors, in particular to a method for preparing polyaniline / manganese dioxide composite materials used for supercapacitors. Background technique [0002] Supercapacitors have a much higher energy density than traditional capacitors and a much higher power density than batteries. They have broad application prospects in electric vehicles, mobile communications, aerospace and defense, and their huge potential market makes them an important part of the energy field. research hotspots. [0003] The performance of supercapacitors depends on the electrode materials. The electrode materials currently used mainly include carbon-based materials, metal oxide materials, and conductive polymer materials. The specific surface of carbon materials is large, the raw materials are cheap, and they have electrical conductivity, which is conducive to large-scale production, but the spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08G73/02C08K3/22H01G9/058H01G11/46H01G11/48H01G11/86
CPCY02E60/13
Inventor 舒东谢正义陈红雨孙红梅彭亮波
Owner SOUTH CHINA NORMAL UNIVERSITY
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