Graphene/polyaniline nano-fiber composite material and preparation method and application in super capacitor thereof

A technology of supercapacitors and nanofibers, applied in fibrous fillers, dyed low-molecular organic compounds, etc., can solve the problems of unguaranteed stability, affecting the conductivity of composite materials, and small capacitance of composite materials

Inactive Publication Date: 2012-07-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document only simply composites graphene and polyaniline using physical methods, and the two materials are combined by van der Waals force, so that the stability of the obtained graphene / polyaniline composite cannot be guaranteed; In the No. Chinese mainland patent application filed by Liu Jianhua et al. in April 2011, the graphene oxide is directly bonded to the conductive polymer through a formylation reaction; During the Smaier-Hacker formylation reaction, the hydroxyl group in the graphene oxide will be replaced by chlorine, which will affect the conductivity of the graphene oxide / conductive polymer composite. In addition, the graphene oxide at this time It contains oxygen-containing groups such as epoxy and ether bonds, which affects the conductivity of the final composite material, so that the capacitance of the composite material is small

Method used

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  • Graphene/polyaniline nano-fiber composite material and preparation method and application in super capacitor thereof
  • Graphene/polyaniline nano-fiber composite material and preparation method and application in super capacitor thereof
  • Graphene/polyaniline nano-fiber composite material and preparation method and application in super capacitor thereof

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Embodiment 1

[0086] Step 1: provide a graphene oxide powder; that is: disperse 5 grams of flake natural graphite into 100 milliliters of concentrated sulfuric acid to form a mixture, and stir the mixture at a high speed in the process; add 10 grams to the above mixture within 1 hour Potassium permanganate powder, keep the mixture mixed with potassium permanganate in ice bath to keep its temperature not exceeding 3°C; after the addition of potassium permanganate is completed, remove the ice bath and slowly add 400 ml of deionized water, then The solution is heated to raise the temperature of the solution to 100°C, and kept at the temperature of 100°C for 1 hour, so that the graphite powder, potassium permanganate powder and sulfuric acid fully react to form graphite oxide; after the reaction, dilute and filter And wash the graphite oxide, then the concentration of 5% Na 2 CO 3 The solution was added to the graphite oxide and stirred to become a homogeneous solution, by adding a concentrati...

Embodiment 2

[0092] step one:

[0093] First, disperse 5 grams of flaky natural graphite into 230 milliliters of concentrated sulfuric acid to form a mixture, and stir the mixture at a high speed during this process; add 30 grams of potassium permanganate powder to the above mixture within 1 hour, and continue the ice bath. Mix the mixture with potassium permanganate to keep its temperature not exceeding 3°C; after the addition of potassium permanganate is completed, remove the ice bath and slowly add 400 ml of deionized water, then heat the solution to increase the temperature of the solution to 100°C, kept at the temperature of 100°C for 1 hour, so that graphite powder, potassium permanganate powder and sulfuric acid fully reacted to form graphite oxide; after the reaction, dilute, filter and wash the graphite oxide, and then Graphite oxide is dissolved in water, then adding a concentration of 5% Na2CO3 solution makes its pH value 6, and the solution is ultrasonically treated for 30 min...

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Abstract

The invention relates to a graphene / polyaniline nano-fiber composite material and a preparation method; an application of the composite material as an electrode material in a super capacitor; and a preparation method of the super capacitor. The composite material is obtained by chemical bond connection of functionally-treated graphene oxides with conductive polymer through amido groups; through reduction of the composite material, the conductivity is increased; combined with its inherent characteristic of structure stability, the composite material has higher electric capacity. The invention also relates to a super capacitor, which comprises a first electrode, a second electrode, a first current collector, a second current collector, a diaphragm, and an electrolytic solution; the first electrode and the second electrode are composed of the graphene oxide / polyaniline composite material, wherein the graphene / polyaniline nano-fiber composite material comprises graphene and conductive polymer which are in chemical bond connection through amido groups.

Description

technical field [0001] The invention relates to a graphene oxide / polyaniline nanofiber composite material and a preparation method thereof, as well as the preparation and application of the material as an electrode material of a supercapacitor. Background technique [0002] Supercapacitors (Supercapacitors), also called Electrochemical capacitors (Electrochemical capacitors), is a new type of energy storage device with energy density and power density between traditional capacitors and batteries. Charging and discharging, long cycle life, instantaneous large current discharge and no pollution to the environment are new energy storage and energy-saving equipment developed in the past ten years. [0003] In the prior art, conductive polymers have been widely used as electrode materials for supercapacitors. Conductive polymer materials have the advantages of small internal resistance and large specific capacity, and the specific capacity is usually 2-3 times that of activated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K9/04C08K9/02C08K3/04C09C1/46C09C3/08H01G9/042
CPCY02E60/13
Inventor 刘建华安军伟于美李松梅马玉骁刘鹏瑞
Owner BEIHANG UNIV
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