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Doped polyaniline electrode material for super-capacitor and preparation method thereof

A technology for supercapacitors and electrode materials, applied in capacitors, electrolytic capacitors, circuits, etc., can solve the problems of low electrochemical activity, small specific capacity, and low energy density, and achieve wide applicability, no need for templates, and high specific capacity Effect

Inactive Publication Date: 2009-12-09
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Kwang Sun Ryu et al. (Kwang SunRyu, Kwang Man Kim, Yong Joon Park, et al. Redox supercapacitor using polyaniline doped with Li salt as electrode [J]. Solid State Ionics, 2002, (152-153): 861-866) (Kwang Sun Ryu, Young-Sik Hong, Yong Joon Park, et al.Polyaniline doped with dimethylsulfate as a polymer electrode for all sold-statepower source system[J].Solid State Ionics 2004, 175(1-4), 759-763) The polyaniline material is doped with lithium salt solution to obtain lithium salt doped polyaniline material, which is used as a supercapacitor electrode. It has better electrochemical behavior than hydrochloric acid doped material in organic electrolyte, but its specific capacity Small, the electrochemical activity in the high potential range is small, and the energy density is low

Method used

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  • Doped polyaniline electrode material for super-capacitor and preparation method thereof
  • Doped polyaniline electrode material for super-capacitor and preparation method thereof
  • Doped polyaniline electrode material for super-capacitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Dissolve 5mL of aniline in 50mL of 1mol / L hydrochloric acid to form solution A, dissolve 12.517g of ammonium persulfate in 100mL of 1mol / L hydrochloric acid to form solution B, add solution B dropwise to solution A, stir, React at room temperature for 5 hours; (2) filter in a G3 sand core funnel, wash the product with distilled water and acetone until it is colorless, and dry it in vacuum for 24 hours to obtain hydrochloric acid-doped polyaniline material; (3) hydrochloric acid-doped polyaniline The material was treated with 1mol / L ammonia water for 24h under stirring conditions, washed, and vacuum-dried for 24h to obtain the intrinsic state polyaniline material; (4) the intrinsic state polyaniline material was dissolved in 0.0835mol / L ZnCl 2 Soak in acetone solution for 24h, in which the intrinsic polyaniline and ZnCl 2 The molar ratio is 1 / 1, washed and dried in vacuum for 48h to obtain Zn 2+ Doped polyaniline material.

[0033] The prepared Zn 2+ The doped polya...

Embodiment 2

[0038] (1) Dissolve 3mL of aniline in 50mL of 2mol / L perchloric acid to form solution A, dissolve 7.5g of ammonium persulfate in 50mL of 2mol / L perchloric acid to form solution B, and add solution B dropwise into the solution In A, stir, and react at room temperature for 8 hours; (2) filter in a G3 sand core funnel, wash the product with distilled water and acetone until it is colorless, and dry it in vacuum for 24 hours to obtain a perchloric acid-doped polyaniline material; (3) The perchloric acid-doped polyaniline material was treated with 2mol / L potassium hydroxide for 24h under stirring conditions, washed, and vacuum-dried for 24h to obtain the intrinsic state polyaniline material; (4) the intrinsic state polyaniline material was mixed with 0.1mol / L Zn(ClO 4 ) 2 Soak in chloroform solution for 24h, in which intrinsic state polyaniline and Zn(ClO 4 ) 2 The molar ratio is 3 / 4, washed and dried in vacuum for 48h to obtain Zn 2+ Doped polyaniline material. The test meth...

Embodiment 3

[0040] (1) Dissolve 10mL of aniline in 100mL of 2mol / L sulfuric acid to form solution A, dissolve 25.034g of ammonium persulfate in 100mL of 2mol / L sulfuric acid to form solution B, add solution B dropwise into solution A, and stir , reacted at room temperature for 10 h; (2) filtered in a G3 sand core funnel, the product was washed with distilled water and acetone until colorless, and dried in vacuum for 24 h to obtain a sulfuric acid-doped polyaniline material; (3) sulfuric acid-doped polyaniline The material was treated with 1mol / L sodium hydroxide for 24h under stirring conditions, washed, and vacuum-dried for 24h to obtain the intrinsic state polyaniline material; (4) the intrinsic state polyaniline material was dissolved in 0.05mol / L FeSO 4 Soaked in dichloromethane solution for 24h, in which intrinsic state polyaniline and FeSO 4 The molar ratio is 2 / 3, washed and dried in vacuum for 48h to obtain Fe 2+ Doped polyaniline material. The test method is as in Example 1. U...

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Abstract

The invention discloses a doped polyaniline electrode material for a super-capacitor and a preparation method thereof. The method comprises the following steps of: firstly, preparing acid doped polyaniline; then, obtaining eigenstate by contra doping of alkali liquor; and finally, obtaining transition metal ion doped polyaniline by re-doping of transition metal salt solution. The specific capacity of the material in an aqueous electrolyte reaches 350 F / g and the specific capacity reaches 100 F / g in an organic electrolyte, so that the problems that a polyaniline material has small specific capacity and low energy density are effectively solved.

Description

technical field [0001] The invention relates to a doped polyaniline electrode material used for a supercapacitor and a preparation method thereof. technical background [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of electrochemical energy storage device developed in recent years. It has the characteristics of high power density, fast charging speed, long cycle life, good safety performance, strong charge retention ability, low leakage current, cheap price, easy maintenance, and environmental friendliness. These characteristics make supercapacitors have broad application prospects in fields such as electric vehicles, hybrid fuel vehicles, electronic communications, aerospace, and national defense. [0003] Supercapacitors can be divided into two types according to the mechanism of storing charges: electric double layer capacitors and Faraday quasi-capacitors. Faraday quasi-capacitor electrode materials mainly include: metal oxide materi...

Claims

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Application Information

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IPC IPC(8): H01G9/042C08L79/02
CPCY02E60/13
Inventor 赖延清张治安李劼崔沐方静
Owner CENT SOUTH UNIV
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