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Preparation method for graphene nanosheet/conducting polymer nanowire composite material

A technology of graphene nanosheets and conductive polymers, applied in circuits, capacitors, electrical components, etc., can solve the problems of reducing charge and discharge cycle stability, reducing polymer capacitance stability, etc., and achieve excellent conductivity and chemical stability , improve electrical properties and stability, and facilitate mass production

Inactive Publication Date: 2012-10-10
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the dopant molecules (mainly inorganic acids and organic acids) of conductive polymers are relatively small, they are easy to diffuse out of the polymer film and reduce the capacitance stability of the polymer.
In addition, during the charge-discharge cycle, the conductive polymer will also cause structural degradation due to its own expansion and contraction, reducing the charge-discharge cycle stability.
At present, the performance and cost performance of "green" energy storage devices, whether commercialized or still in the research and development stage, need to be further improved

Method used

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  • Preparation method for graphene nanosheet/conducting polymer nanowire composite material
  • Preparation method for graphene nanosheet/conducting polymer nanowire composite material
  • Preparation method for graphene nanosheet/conducting polymer nanowire composite material

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Embodiment 1

[0019] Embodiment 1. Graphene nanosheet / conductive polypyrrole nanowire composite material

[0020] The flake graphite was prepared into graphite oxide by chemical oxidation method, graphite oxide was peeled off ultrasonically in 500mL deionized water to obtain graphene oxide suspension, the pH value was adjusted to 9~10 with sodium hydroxide, and 1.8g sodium borohydride was added to graphite oxide olefin suspension, stirred at 80°C for 1 hour, then vacuum filtered and washed. The sample obtained above was dispersed in 500 mL of deionized water, 0.75 g of anthranilic acid was added thereto, and stirred at 0° C. for 5 hours. Add 5 mL of hydrazine hydrate to the anthranilate-sulfonated graphene oxide suspension, stir at 95°C for 12 hours, then wash with absolute ethanol and deionized water several times, filter with suction, and dry in vacuo. The resulting product was ultrasonically dispersed in deionized water to obtain an anthranilate-sulfonated graphene suspension. Characte...

Embodiment 2

[0022] Embodiment 2. Graphene nanosheet / conductive polypyrrole nanowire composite material

[0023] The preparation method of anthranilinesulfonated graphene suspension (concentration 1mg / mL) is as shown in Example 1. The prepared anthranilic sulfonated graphene suspension was uniformly coated on the surface of a stainless steel electrode by spin coating method, and a thin film was formed after vacuum drying, which was used as a working electrode. The method for electrodepositing polypyrrole is the same as that shown in Example 1 to obtain a graphene nanosheet / conductive polypyrrole nanowire composite material. Conductive polypyrrole nanowires with a diameter of 95 nm can be uniformly dispersed on graphene sheets.

Embodiment 3

[0024] Embodiment 3. Graphene nanosheet / conductive polypyrrole nanowire composite material

[0025] The preparation method of anthranillin sulfonated graphene suspension (concentration 3mg / mL) is as shown in Example 1. The prepared anthranilic sulfonated graphene suspension was uniformly coated on the surface of a stainless steel electrode by spin coating method, and a thin film was formed after vacuum drying, which was used as a working electrode. The method for electrodepositing polypyrrole is the same as that shown in Example 1 to obtain a graphene nanosheet / conductive polypyrrole nanowire composite material. Conductive polypyrrole nanowires with a diameter of 110 nm can be uniformly dispersed on graphene sheets.

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Abstract

The invention discloses a preparation method for a graphene nanosheet / conducting polymer nanowire composite material. The preparation method comprises the following steps of: preparing a graphite oxide by utilizing a chemical oxidation method, dispersing the product into de-ionized water, adding an orthanilic acid into the mixed solution according to a proportion, and stirring the mixed solution to make the orthanilic acid fully adsorbed onto a partially reduced graphene oxide nanosheet; adding hydrazine hydrate according to a proportion, stirring the mixed solution, and performing washing, suction-filtration and vacuum drying by using absolute ethanol and the de-ionized water; ultrasonically dispersing the product into the de-ionized water to obtain graphene nanosheet suspension; and uniformly coating the prepared suspension on the surface of the conducting substrate by adopting a spin coating method, performing vacuum drying to form a thin film which is used as a working electrode, placing the working electrode, a counter electrode and a reference electrode into aqueous dispersion containing conducting polymer monomers, and clustering and depositing the monomers on the surface of the graphene nanosheet by using an electrochemical cyclic voltammetry technology. The method is simple, easy, low in reaction temperature, short in time and high in chemical uniformity.

Description

technical field [0001] The invention relates to a preparation method of a graphene nanosheet / conductive polymer nanowire composite material, which belongs to the technical field of preparation of new energy materials. Background technique [0002] With the increasingly prominent energy and environmental issues, how to realize the efficient and clean utilization of energy has become a major issue that needs to be solved urgently. The use of electrochemical energy storage devices to provide various forms of energy, including vehicle power, is one of the most promising ways to use energy efficiently and cleanly. Supercapacitors are a new type of energy storage device developed after nickel-hydrogen batteries and lithium-ion batteries in recent years. They have broad application prospects in solar products, electric toys, microelectronics industry, military applications, and automotive industries. Electrode material is a key factor affecting the performance and production cost ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/058C08G73/06C08G73/02
Inventor 李靖谢华清刘捷李朱新曹琴
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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