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Method of preparing super capacitor electrode material polyaniline nano fiber

A supercapacitor and nanofiber technology, applied in the field of preparation of supercapacitor electrode materials, can solve the problems of cumbersome post-treatment process, large amount of emulsifier, and difficulty in obtaining products, and achieve poor cycle performance, good cycle life, and low cost effect

Inactive Publication Date: 2009-04-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Common methods for synthesizing polyaniline nanofiber materials include template method, emulsion polymerization method, electrochemical polymerization method, etc. However, these existing methods have certain shortcomings. For example, the template method can only synthesize nano-scale short fibrils or one end and membrane Connected brush-like structure fibers, and the operation is complicated and the cost is high; the emulsion polymerization method uses a large amount of emulsifier during the reaction process, the obtained polymer content is low, and the post-treatment process is cumbersome; the main defect of the electrochemical polymerization method is that the receiving electrode Limited by the area, it is difficult to obtain a large amount of products, so it is not suitable for large-scale production

Method used

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  • Method of preparing super capacitor electrode material polyaniline nano fiber
  • Method of preparing super capacitor electrode material polyaniline nano fiber
  • Method of preparing super capacitor electrode material polyaniline nano fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Embodiment 1: (1) the aniline of 0.93ml is dissolved in 100ml organic solvent CCl 4 Solution A was made in , and 0.57g of ammonium persulfate was dissolved in 100ml of 1mol / L hydrochloric acid to make solution B ([APS] / [AN]=1:4); (2) Move solution A and solution B into In the reaction bottle, react at room temperature for 5h; (3) collect the product in solution B, wash the product with water, ethanol and acetone until the washing liquid is colorless; (4) vacuum dry the washed product at 40°C for 48h to obtain Hydrochloric acid doped polyaniline nanofibrous material. The calculated polyaniline single-electrode specific capacitance is 317F / g, and the capacity fading is within 4% after 500 charge-discharge cycles.

Embodiment 2

[0016] Embodiment 2: (1) the aniline of (1) is dissolved in 100ml organic solvent toluene and is made into solution A, and the ammonium persulfate of 2.28g is dissolved in the 2mol / L hydrochloric acid of 100ml and is made into solution B ([APS] / [AN ]=1:2); (2) solution A and solution B are moved into the reaction bottle successively, and react at room temperature for 10h; (3) collect the product in solution B, wash the product with water, ethanol and acetone, until the washing liquid is free (4) The washed product was vacuum-dried at 60° C. for 24 hours to obtain polyaniline nanofibers doped with hydrochloric acid. The specific capacitance of the polyaniline single electrode prepared in this example is 308 F / g, and the capacity fading within 500 charge-discharge cycles is within 5%.

Embodiment 3

[0017] Embodiment 3: (1) the aniline of 0.465ml is dissolved in 100ml organic solvent CH 2 Cl 2 Solution A is made in the solution A, and the ammonium persulfate of 0.285g is dissolved in the 1mol / L perchloric acid of 100ml and made solution B ([APS] / [AN]=1:1); (2) solution A and solution B Move them into the reaction bottle in turn, and react at room temperature for 20 hours; (3) collect the product in solution B, wash the product with water, ethanol and acetone until the washing liquid is colorless; (4) vacuum-dry the washed product at 80°C for 12 hours , to obtain perchloric acid-doped polyaniline nanofiber materials. The specific capacitance of the polyaniline single electrode prepared in this example is 302 F / g, and the capacity fading is within 4% after 500 charge-discharge cycles.

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Abstract

The invention discloses a method for preparing polyaniline nanometer fiber used as the electrode material of super capacitor, which uses monomer aniline and oxidant ammonium persulphate as materials, using the aggregate reaction at oil / water interface to prepare polyaniline material, and optimizes and controls the interface aggregate technique to prepare the polyaniline nanometer fiber whose diameter is between 30-120nm and length is between 500nm and some micrometers. When in use, the inventive material can hold high capacitance per unit volume and obtain long service life, while the capacitance attenuation after 500 times of discharge-charge circles is under 5%, to improve the electrode circle property. Compared with present technique, the invention has simple process, simple operation and low cost, while it can prepare much nanometer fiber polyaniline material via one process, to support batch production.

Description

technical field [0001] The invention relates to a preparation method of an electrode material for a supercapacitor, in particular to a method for preparing a polyaniline nanofiber as an electrode material for a supercapacitor. Background technique [0002] Conductive polyaniline supercapacitors have the advantage of high specific capacitance, but their disadvantages mainly lie in poor cycle performance. In order to improve its cycle performance, many researchers use carbon material modified polyaniline as supercapacitor electrode material. Such as LAI Yan-qing et al. (LAI Yan-qing, LI Jing, LI Jie, et al. Preparation and electrochemical characterization of C / PANI composite electrodematerials [J]. Journal of Central South University of Technology, 2006, 13 (4): 353-359) found that the electrode prepared by using the irregular granular polyaniline material prepared by the traditional chemical method alone lost 70% of its capacity after 200 charge-discharge cycles, while the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/76C08G73/02
Inventor 赖延清卢海张治安李劼李晶李荐宋海申刘业翔
Owner CENT SOUTH UNIV
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