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Preparation method of polypyrrole/ graphene composite material

A composite material, graphene technology, used in cable/conductor manufacturing, carbon-silicon compound conductors, organic material conductors, etc., can solve the problems of short life, high cost of carbon nanotubes, and low specific capacitance

Active Publication Date: 2010-11-10
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductive polypyrrole (PPy) based on redox reaction pseudocapacitance has short life, poor stability and rate characteristics as a supercapacitor electrode material. In order to improve and enhance the performance of polypyrrole, a large number of researchers have focused on polypyrrole and other materials. In terms of compounding, compounding with carbon nanotubes and other carbon materials has been widely carried out in recent years. The research results show that compounding with carbon nanotubes can greatly improve the performance of supercapacitors. However, carbon nanotubes have disadvantages such as high cost and low specific capacitance.

Method used

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  • Preparation method of polypyrrole/ graphene composite material
  • Preparation method of polypyrrole/ graphene composite material
  • Preparation method of polypyrrole/ graphene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Reduction of graphene oxide: get 0.05g of graphite oxide and dissolve it in 50mL of water for ultrasonication for 120 minutes to form a graphene oxide solution with a mass concentration of 1g / L, add 0.25mL of hydrazine hydrate dropwise to the graphene oxide solution, and then add Slowly add ammonia water to the mixed solution to adjust the pH value to 8.0, and react in an oil bath at 95°C for 24 hours. After the reaction is completed, the product is washed with water to obtain a graphene wet powder, and the graphene wet powder is placed in 50 mL of deionized water for ultrasonication. Disperse for 10 minutes to obtain a stably dispersed graphene colloid.

[0018] (2) Preparation of polypyrrole / graphene composite material: take all the graphene colloids prepared in step (1) and 5g of pyrrole monomer and mix with ultrasound for 60 minutes, pour the mixed solution into a round bottom flask and stir in an ice bath 10 minutes, while 15gFeCl 3 ·6H 2 O dissolved in 150mL...

Embodiment 2

[0021] (1) Reduction of graphene oxide: Dissolve 0.05g of graphite oxide in 60mL of water, ultrasonicate for 110 minutes, configure a graphene oxide solution with a mass concentration of 0.83g / L, add 0.32mL of hydrazine hydrate dropwise to the graphene oxide solution, Then slowly add ammonia water to the mixed solution to adjust the pH value to 8.5, and react for 24 hours under the condition of an oil bath (95° C.). Deionized water was ultrasonically dispersed for 10 minutes to obtain stable dispersed graphene colloids.

[0022] (2) Preparation of polypyrrole / graphene composite material: take all the graphene colloids prepared in step (1) and 0.45g pyrrole monomer and mix with ultrasound for 55 minutes, pour the mixed solution into a round bottom flask and place it in an ice bath Stir for 10 minutes while adding 10 g FeCl 3 ·6H 2 O dissolved in 100mL of 0.1mol / L hydrochloric acid mixed solution was slowly added dropwise to the round-bottomed flask, and after the dropwise add...

Embodiment 3

[0026] (1) Reduction of graphene oxide: Dissolve 0.05g of graphite oxide in 70mL of water, ultrasonicate for 100 minutes, configure a graphene oxide solution with a mass concentration of 0.71g / L, add 0.36mL of hydrazine hydrate dropwise to the graphene oxide solution, Then slowly add ammonia water to the mixed solution to adjust the pH value to 8.8, and react for 24 hours under the condition of an oil bath (95° C.). After the reaction is completed, the product is washed with water to obtain a graphene wet powder. Ultrasonic dispersion in deionized water for 15 minutes resulted in stable dispersed graphene colloids.

[0027] (2) Preparation of polypyrrole / graphene composite material: take all the graphene colloids prepared in step (1) and 0.2g pyrrole monomer and mix with ultrasound for 45 minutes, pour the mixed solution into a round bottom flask and place it in an ice bath Stir for 10 minutes while adding 9 g FeCl 3 ·6H 2 O dissolved in 90mL of 0.1mol / L hydrochloric acid mi...

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Abstract

The invention relates to a preparation method of polypyrrole / graphene composite material, comprising the steps of: reducing graphite oxide by hydrazine hydrate, washing the reduction product by deionized water, and obtaining graphene colloid which is evenly dispersed; mixing the graphene colloid and pyrrole monomer according to a certain proportion, carrying out ultrasonic dispersion, and then stirring under the condition of ice bath; slowly dripping FeCl3 hydrochloric acid solution into reactant, and leading the reactant to react under the condition of ice bath after dripping; and finally, washing and drying after the reaction, and obtaining the polypyrrole / graphene composite material powder. The invention has simple technique condition and low cost, and the polypyrrole in the prepared composite material is evenly covered by graphene. Furthermore, the polypyrrole / graphene composite material can be taken as super-capacitor, and has high conductivity and good electrochemical performance.

Description

technical field [0001] The invention relates to a preparation method of a polypyrrole / graphene composite material, in particular to a method for forming a stable composite material through in-situ polymerization of polypyrrole / graphene. Background technique [0002] Polypyrrole (PPy), a conductive polymer material containing conjugated double bonds, has high conductivity and specific capacitance, and is widely used in biosensors, supercapacitors and other fields, and has attracted people's attention since its discovery. However, the conductive polypyrrole (PPy) based on redox reaction pseudocapacitance has short life, poor stability and rate characteristics as a supercapacitor electrode material. In order to improve and enhance the performance of polypyrrole, a large number of researchers have focused on polypyrrole and other materials. In terms of compounding, compounding with carbon nanotubes and other carbon materials has been widely carried out in recent years. The resea...

Claims

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Application Information

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IPC IPC(8): H01B1/04H01B1/12H01B13/00H01G9/042
CPCY02E60/13
Inventor 张大成马衍伟张熊陈尧余鹏
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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