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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 prepared graphene film has poor mechanical and electrochemical properties, which limits the application of this type of material.

Method used

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  • Method for preparing graphene composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0035](1) Take the graphene oxide aqueous dispersion prepared by the above method, and adjust the concentration to 8.6 mg / mL. In 2.3mL graphene oxide aqueous dispersion, add 3mg FeCl 3 , shake to form graphene oxide hydrogel. Then use a scraper with a height of 520 μm to scrape the graphene oxide hydrogel on the glass substrate through hydrophilic treatment to make it evenly form a film (4 μm), and let it stand for 15 minutes, and the glass substrate coated with graphene oxide film Put it into the mixed solution of hydroiodic acid and HAc with a volume ratio of 1:2, soak it at room temperature for 2 hours, 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 was separated from the glass substrate, and then it was washed repeatedly with deionized water to remove residual HI and other impurities in the material. Finally, the mate...

Embodiment 2

[0040] (1) Take the graphene oxide aqueous dispersion prepared by the above method, and adjust the concentration to 8.6 mg / mL. In 2.3mL graphene oxide aqueous dispersion, add 3mg FeCl 3 , shake to form graphene oxide hydrogel. Then use a scraper with a height of 520 μm to scrape the graphene oxide hydrogel on the glass substrate through hydrophilic treatment to make it evenly form a film (4 μm), and let it stand for 15 minutes, and the glass substrate coated with graphene oxide film Put it into the mixed solution of hydroiodic acid and HAc with a volume ratio of 1:2, soak it at room temperature for 2 hours, 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 was separated from the glass substrate, and then it was washed repeatedly with deionized water to remove residual HI and other impurities in the material. Finally, the mat...

Embodiment 3

[0045] (1) Take the graphene oxide aqueous dispersion prepared by the above method, and adjust the concentration to 8.6 mg / mL. In 2.3mL graphene oxide aqueous dispersion, add 3mg FeCl 3 , shake to form graphene oxide hydrogel. Then use a scraper with a height of 520 μm to scrape the graphene oxide hydrogel on the glass substrate through hydrophilic treatment to make it evenly form a film (4 μm), and let it stand for 15 minutes, and the glass substrate coated with graphene oxide film Put it into the mixed solution of hydroiodic acid and HAc with a volume ratio of 1:2, soak it at room temperature for 2 hours, 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 was separated from the glass substrate, and then it was washed repeatedly with deionized water to remove residual HI and other impurities in the material. Finally, the mat...

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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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