Preparation method for well-organized high-capacity self-supporting film based on epitaxial growth of polyaniline on graphene surface

A graphene surface, self-supporting thin film technology, used in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc. control, the method is simple and feasible, and the effect of improving thermal stability

Active Publication Date: 2013-10-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the poor stability of the graphene oxide / polyaniline composite material prepared by the existing method, and the technical problem that the structure is a disordered structure, and to provide an ordered high-capacity polyaniline based on graphene surface epitaxial growth Preparation method of self-supporting film

Method used

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  • Preparation method for well-organized high-capacity self-supporting film based on epitaxial growth of polyaniline on graphene surface
  • Preparation method for well-organized high-capacity self-supporting film based on epitaxial growth of polyaniline on graphene surface
  • Preparation method for well-organized high-capacity self-supporting film based on epitaxial growth of polyaniline on graphene surface

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specific Embodiment approach 1

[0037] Embodiment 1: In this embodiment, a method for preparing an ordered high-capacity self-supporting film based on epitaxial growth of polyaniline on the surface of graphene is carried out according to the following steps:

[0038] 1. Preparation of graphene oxide:

[0039] Dry 2g of graphite at 80°C to obtain graphite powder, mix 3ml of concentrated sulfuric acid, 1gK 2 S 2 o 8 Mix with 1g of phosphorus pentoxide, heat to 80°C, add dried graphite powder, and the solution becomes black. When the color of the solution turns blue-black, keep it warm for 6 hours, cool down to room temperature naturally, dilute, filter with suction, and wash until the lotion is neutral , dry naturally at room temperature, add a solution consisting of 1g of sodium nitrate and 45ml of sulfuric acid while stirring at 0-4°C, stir for 30 minutes, add 6g of potassium permanganate, stir for 90 minutes to obtain a mixed solution, and then heat the mixed solution To 35°C, continue to stir for 30min,...

specific Embodiment approach 2

[0045] Embodiment 2: This embodiment differs from Embodiment 1 in that the concentration of the graphene oxide solution in step 1 is 0.5 mg / mL. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0046] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the electrodeposition method described in step four is as follows:

[0047] Clean the 0.2mm thick Ni sheet or ITO glass with acetone, methanol and ultrapure water for 20 minutes, and then dry it, then insert the Ni sheet or ITO glass into the solution with a concentration of 1-100mg / mL, and adjust the electrophoresis instrument It is a constant voltage mode, deposited at a constant voltage of 1-100V for 5-200min, and obtains an ordered high-capacity self-supporting film based on the epitaxial growth of polyaniline on the surface of graphene. Others are different from the first or second specific embodiment.

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Abstract

The invention discloses a preparation method for a well-organized high- capacity self-supporting film based on epitaxial growth of polyaniline on a graphene surface and relates to the preparation method for the self-supporting film. The method that solves the problems that an oxidized graphene / polyaniline composite prepared by a conventional method is poor in stability and disordered in structure comprises the following steps: first, preparing the oxidized graphene; second, performing aniline acidation; third, preparing powder with the graphene / polyaniline micron-sized composite structure; and fourth, dissolving the powder obtained in the third step into the water, followed by sedimentation by utilizing an electrodeposition method, a vertical pulling method, a natural sedimentation method, a suction filtration sedimentation method or a spin-coating sedimentation method, thereby obtaining the film. According to the method, various directional sedimentation methods are adopted for film forming, the film with the layered ordered structure is obtained; the prepared film has favorable self-supporting performance from the aspect of macroscopic performance, and is proved to be high in electric capacity up to 323 F / g by a cyclic voltammetry, and be good in stability. The method belongs to the field of electrode material preparation.

Description

technical field [0001] The invention relates to a preparation method of a support film. Background technique [0002] As a new type of energy storage device, supercapacitors have a wide range of applications in various fields due to their significant advantages such as large capacity, high power density, strong charge and discharge capacity, long cycle life, wide operating temperature range, and no pollution. Prospects, as a new type of energy-saving and energy storage device, it can develop rapidly today when energy and the environment are under tremendous pressure. [0003] The development of high-performance electrode materials is an important factor limiting the development of supercapacitors. The use of conductive polymers as electrode materials has a major breakthrough in improving the conductivity and capacitance of supercapacitors. As a new type of conductive material, graphene has set off a research boom with its excellent performance since its advent. Graphene is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/48H01G11/86C08G73/02
Inventor 李垚杨永柠左璠雨王佳禹丛庆
Owner HARBIN INST OF TECH
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