Oxidized grapheme/polyaniline super capacitor composite electrode material and preparation method and application thereof

A technology for supercapacitors and composite electrodes, applied in inorganic composite materials and organic fields, can solve the problems of insignificant improvement of composite material performance, high cost of carbon nanotube preparation, limited application performance, etc., and achieves superior performance, improved mechanical properties, good Application prospects and economic benefits

Active Publication Date: 2009-09-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the specific surface area of ​​activated carbon is large, due to its poor conductivity, the performance of composite materials is not significantly improved; the high cost of carbon nanotubes also greatly limits its application performance.

Method used

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  • Oxidized grapheme/polyaniline super capacitor composite electrode material and preparation method and application thereof
  • Oxidized grapheme/polyaniline super capacitor composite electrode material and preparation method and application thereof
  • Oxidized grapheme/polyaniline super capacitor composite electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the preparation of graphite oxide. Add 10g of phosphorus pentoxide and 10g of potassium persulfate into 30mL of concentrated sulfuric acid at 80°C and stir for 30 minutes, take it out, react at room temperature for 6 hours, filter the product, wash to neutral and dry at room temperature to constant weight. Add the above product into 460mL of concentrated sulfuric acid at 0°C, stir and slowly add potassium permanganate, while controlling the temperature of the system not to exceed 15°C, stir evenly and raise the temperature to 35±3°C, continue stirring for a certain period of time, and then pour into the system Slowly add 1L of deionized water, control the temperature not to exceed 100°C, and continue stirring for 15 minutes. Add 2.8L of deionized water and 50mL of 30% hydrogen peroxide. After stirring for 5 min, the resulting brown suspension was suction-filtered and dialyzed until there was no sulfate ion in the filtrate. The product was vacuum dried at...

Embodiment 2

[0033] Embodiment 2: the preparation of graphite oxide is the same as embodiment 1.

[0034] (1) Add 15.5 mg of graphite oxide to 196.79 mL of water and sonicate for 20-120 min to form a graphene oxide solution uniformly dispersed in a single layer; (2) Add 0.93 mL of aniline dropwise to the obtained graphene oxide solution at room temperature , sonicated for 10 to 60 minutes to disperse and form a mixed solution of 0.05mol / L aniline; (3) at 0°C, add 1.72mL of 30% hydrogen peroxide and 0.33mL of 0.1mol / L trichloro Ferric chloride and 0.23mL of 37% hydrochloric acid solution, the concentration of hydrogen peroxide is 0.083mol / L, the concentration of hydrochloric acid is 0.1mol / L, stirring and polymerizing for 24h; (4) After the reaction is completed, the obtained mixed solution is centrifuged, water, After repeated washing with ethanol, the graphene oxide / polyaniline composite electrode material with a mass ratio of graphite oxide to aniline (GO:ANI) of 1:60 was obtained by vac...

Embodiment 3

[0036] Embodiment 3: the preparation of graphite oxide is the same as embodiment 1.

[0037] (1) Add 186.2 mg of graphite oxide to 190.61 mL of water and sonicate for 20 to 120 min to form a graphene oxide solution uniformly dispersed in a single layer; (2) Add 3.73 mL of aniline dropwise to the obtained graphene oxide solution at room temperature , sonicated for 10 to 60 minutes to disperse and form a mixed solution of 0.2mol / L aniline; (3) at 10°C, add 4.12mL of 30% hydrogen peroxide and 0.4mL of 0.1mol / L trichloro Ferric chloride and 1.14mL of 37% hydrochloric acid solution, the concentration of hydrogen peroxide is 0.2mol / L, the concentration of hydrochloric acid is 0.5mol / L, stirred and polymerized for 12h; (4) After the reaction is completed, the obtained mixed solution is centrifuged, washed with water, After repeated washing with ethanol, the graphene oxide / polyaniline composite electrode material with a mass ratio of graphite oxide to aniline (GO:ANI) of 1:20 was obta...

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Abstract

The invention discloses an oxidized grapheme/polyaniline super capacitor composite electrode material and the preparation method and the application thereof. The preparation method comprise the following steps: firstly, adding oxidized graphite to water for ultrasonic dispersion so as to form an oxidized grapheme solution with uniformly dispersed single pieces; at room temperature, dropping aniline to the obtained oxidized grapheme solution for continuous ultrasonic dispersion to from a mixed solution; at a low temperature condition, adding hydrogen peroxide, ferric trichloride and a hydrochloric acid solution dropwise to the mixed solution, and stirring the solution for polymerization; and after the reaction is finished, centrifugating, washing and roasting the obtained mixed solution in vacuum to obtain the oxidized grapheme/polyaniline super capacitor composite electrode material which is used as the electrode material of an electricity storage system of a super capacitor and a battery. The oxidized grapheme/polyaniline super capacitor composite electrode material with good electrochemistry performance is obtained by the method, and the specific capacity of the oxidized grapheme and the polyaniline is greatly improved. In addition, the addition of the oxidized grapheme improves the charge and discharge service life of the polyaniline.

Description

technical field [0001] The invention belongs to organic and inorganic composite materials, in particular to a graphene oxide / polyaniline supercapacitor composite electrode material and a preparation method thereof. Background technique [0002] Supercapacitors have huge application value and market potential in automobiles, electric power, railways, communications, national defense, consumer electronics, etc., and have been widely concerned by countries all over the world. But there has been a bottleneck in the production of high-performance electrode materials, the core part of supercapacitors. Most of the current ultracapacitor products are cheap carbon materials based on the electric double layer capacitor power storage mechanism. It is very difficult to increase their power density and energy density on this basis; are greatly restricted. Conductive polyaniline, which stores charges based on pseudocapacitive redox reactions, has high energy density, but its ion doping / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/058H01G9/042H01G9/155H01M14/00H01G11/30H01G11/86
CPCY02E60/13
Inventor 郝青丽汪信王华兰江晓红杨绪杰陆路德
Owner NANJING UNIV OF SCI & TECH
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