Method for preparing graphene composite film

A graphene composite, graphene technology, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of poor mechanical properties and electrochemical properties of graphene films, low preparation efficiency, and complicated preparation methods, and achieve good electrochemical properties and high toughness. Effect

Active Publication Date: 2017-10-20
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing graphene film preparation methods are cumbersome, the preparation efficiency is too low, and the p

Method used

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  • Method for preparing graphene composite film
  • Method for preparing graphene composite film
  • Method for preparing graphene composite film

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] (1) Take the graphene oxide aqueous dispersion prepared according to the above method and adjust the concentration to 8.6 mg / mL. Add 3mg FeCl to 2.3mL graphene oxide aqueous dispersion 3 , Oscillate to form graphene oxide hydrogel. Then use a squeegee with a height of 520μm to scrape the graphene oxide hydrogel onto the hydrophilically treated glass substrate to form a uniform film (4μm), and let it stand for 15 minutes. The glass substrate coated with the graphene oxide film Put it in a 1:2 volume ratio of hydroiodic acid and HAc mixture and soak for 2 hours at room temperature. The graphene oxide hydrogel film gradually turns black and the graphene oxide is reduced. Then the mixture was heated to 75°C and kept at this temperature for 6h. The black reduced graphene oxide film is separated from the glass substrate, and then washed repeatedly with deionized water to remove the residual HI and other impurities in the material. Finally, the material was ...

Example Embodiment

[0039] Example 2

[0040] (1) Take the graphene oxide aqueous dispersion prepared according to the above method and adjust the concentration to 8.6 mg / mL. Add 3mg FeCl to 2.3mL graphene oxide aqueous dispersion 3 , Oscillate to form graphene oxide hydrogel. Then use a squeegee with a height of 520μm to scrape the graphene oxide hydrogel onto the hydrophilically treated glass substrate to form a uniform film (4μm), and let it stand for 15 minutes. The glass substrate coated with the graphene oxide film Put it in a 1:2 volume ratio of hydroiodic acid and HAc mixture and soak for 2 hours at room temperature. The graphene oxide hydrogel film gradually turns black and the graphene oxide is reduced. Then the mixture was heated to 75°C and kept at this temperature for 6h. The black reduced graphene oxide film is separated from the glass substrate, and then washed repeatedly with deionized water to remove the residual HI and other impurities in the material. Finally, the material was ...

Example Embodiment

[0044] Example 3

[0045] (1) Take the graphene oxide aqueous dispersion prepared according to the above method and adjust the concentration to 8.6 mg / mL. Add 3mg FeCl to 2.3mL graphene oxide aqueous dispersion 3 , Oscillate to form graphene oxide hydrogel. Then use a squeegee with a height of 520μm to scrape the graphene oxide hydrogel onto the hydrophilically treated glass substrate to form a uniform film (4μm), and let it stand for 15 minutes. The glass substrate coated with the graphene oxide film Put it in a 1:2 volume ratio of hydroiodic acid and HAc mixture and soak for 2 hours at room temperature. The graphene oxide hydrogel film gradually turns black and the graphene oxide is reduced. Then the mixture was heated to 75°C and kept at this temperature for 6h. The black reduced graphene oxide film is separated from the glass substrate, and then washed repeatedly with deionized water to remove the residual HI and other impurities in the material. Finally, the material was ...

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Abstract

The invention provides a method for preparing a graphene composite film. The method firstly uses metal ions to crosslink with graphene oxide to prepare a graphene oxide hydrogel, then prepares a porous graphene film material through a knife-coating method, a chemical reduction method and a freeze-drying method, then polymerizes a titanium-containing conjugated polymer in pores of the porous graphene film material by an electrochemical polymerization method, and finally obtains the high-toughness graphene composite film. The graphene composite film prepared by the invention has higher toughness, better pore distribution and good electrochemical performance, and is suitable for use as a flexible super capacitor electrode material.

Description

(1) Technical field [0001] The invention belongs to the technical field of graphene film preparation, and in particular relates to a preparation method of a novel high-toughness graphene composite film. (2) Background technology [0002] Graphene is composed of a single layer with a large number of sp 2 A carbon material with a two-dimensional honeycomb crystal structure formed by the close arrangement of hybridized carbon atoms. Its unique structure makes it have excellent physical properties such as high theoretical specific surface area, ultrafast electron mobility, high Young's modulus, high strength and high thermal conductivity. Based on the excellent properties of the above graphene materials, graphene materials have broad application prospects in the fields of energy storage, catalysis, sensors, and functional composite materials, especially in the future of nanoelectronic devices, composite materials, solar cells, and supercapacitors. It has great application pros...

Claims

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Application Information

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IPC IPC(8): H01G11/36
CPCY02E60/13H01G11/36
Inventor 张诚杜惟实吕耀康
Owner ZHEJIANG UNIV OF TECH
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