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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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 o

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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

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Example Embodiment

[0016] Example 1

[0017] (1) Reduction of graphene oxide: Dissolve 0.05 g of graphite oxide in 50 mL of water and ultrasonically for 120 minutes, configure it into a graphene oxide solution with a mass concentration of 1 g / L, drop 0.25 mL of hydrazine hydrate into the graphene oxide solution, and then add 0.25 mL of hydrazine hydrate to the graphene oxide solution. Ammonia water was slowly added dropwise in the mixed solution to adjust the pH value to 8.0, and the reaction was carried out in an oil bath at 95° C. for 24 hours. After the reaction was completed, the product was washed with water to obtain a graphene wet powder, and the graphene wet powder was placed in 50 mL of deionized water for ultrasound. After 10 minutes of dispersion, a stably dispersed graphene colloid was obtained.

[0018] (2) Preparation of polypyrrole / graphene composite material: take all the graphene colloids obtained in step (1) and 5 g of pyrrole monomer, mix and ultrasonicate for 60 minutes, pour...

Example Embodiment

[0020] Example 2

[0021] (1) Reduction of graphene oxide: Dissolve 0.05 g of graphite oxide in 60 mL of water, ultrasonicate for 110 minutes, configure it into a graphene oxide solution with a mass concentration of 0.83 g / L, and add 0.32 mL 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, react for 24 hours in an oil bath (95° C.), wash the product with water after the reaction to obtain a graphene wet powder, put the graphene wet powder into 50 mL Deionized water was ultrasonically dispersed for 10 minutes to obtain stably dispersed graphene colloids.

[0022] (2) Preparation of polypyrrole / graphene composite material: take all the graphene colloids obtained in step (1) and 0.45 g of pyrrole monomer, mix and ultrasonicate for 55 minutes, pour the mixed solution into a round-bottomed flask and place it under ice bath conditions Stir for 10 minutes while adding 10 g FeCl 3 ·6H 2 ...

Example Embodiment

[0025] Example 3

[0026] (1) Reduction of graphene oxide: Dissolve 0.05 g of graphite oxide in 70 mL of water, ultrasonicate for 100 minutes, configure it into a graphene oxide solution with a mass concentration of 0.71 g / L, and add 0.36 mL of hydrazine hydrate dropwise to the graphene oxide solution, Then slowly add ammonia water to the mixed solution dropwise to adjust the pH value to 8.8, react in an oil bath (95° C.) for 24 hours, wash the product with water after the reaction to obtain a graphene wet powder, put the graphene wet powder into 50 mL Ultrasonic dispersion in deionized water for 15 minutes resulted in stable dispersion of graphene colloids.

[0027] (2) Preparation of polypyrrole / graphene composite material: take all the graphene colloids obtained in step (1) and 0.2 g of pyrrole monomer, mix and ultrasonicate for 45 minutes, pour the mixed solution into a round-bottomed flask and place it under ice bath conditions Stir for 10 minutes while adding 9 g FeCl ...

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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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