Preparation method of three-dimensional porous graphene

A three-dimensional porous, graphene technology, applied in graphene, nano-carbon and other directions, can solve the problems of unsatisfactory graphene sheet bonding and poor electrical conductivity, and achieve the effects of reducing interface resistance, easy process, and excellent electrical conductivity.

Active Publication Date: 2013-06-05
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the unsatisfactory combination of graphene sheets obtained by hydrothermal reduction, the electrical conductivity is poor. In order to further improve the electrical conductivity of graphene and promote the practical application of graphene, it is necessary to prepare graphene materials with a porous structure.

Method used

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  • Preparation method of three-dimensional porous graphene
  • Preparation method of three-dimensional porous graphene
  • Preparation method of three-dimensional porous graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of graphene oxide aqueous solution: Prepare graphene oxide aqueous solution with a concentration of 3 mg / ml by modified Hummers method; preparation of toluene soluble asphalt: mix mesophase pitch powder with toluene at a ratio of 1 g: 40 ml, at 75 ° C Dissolve under heat for 4 hours, separate the toluene soluble part of pitch;

[0036] Graphene oxide reduction repair: Mix 30ml of the 3mg / ml above-mentioned graphene aqueous solution with 3ml of asphalt toluene solubles and stir for 30 minutes, put the mixed solution into a 45ml hydrothermal reactor, and react at 240°C for 15 hours. Take out the sample and cool it to room temperature, wash the sample several times with deionized water, and then freeze-dry;

[0037] Graphene heat treatment: heat-treat the dried sample at 1000°C for 0.5-3 hours under argon protection to obtain the final sample.

[0038] Obtain cylindrical solid three-dimensional graphene, its SEM photograph sees Figure 2A-2C , macro photo see...

Embodiment 2

[0040] The preparation process and steps in this example are basically the same as those in Example 1 above. The difference is: 30ml of 3mg / ml above-mentioned graphene aqueous solution and 5ml of asphalt toluene solubles are mixed and stirred. Obtain cylindrical solid three-dimensional graphene, its macroscopic photograph sees image 3 In c, it can be seen that the prepared graphene is a three-dimensional porous structure. The sheet resistance prepared in this embodiment is 3Ω sq. -1 .

Embodiment 3

[0042] The preparation process and steps in this example are basically the same as those in Example 1 above. The difference is: 30ml of 3mg / ml above-mentioned graphene aqueous solution and 10ml of asphalt toluene solubles are mixed and stirred. Obtain cylindrical solid three-dimensional graphene, its macroscopic photograph sees image 3 d in The sheet resistance prepared by this embodiment is 6Ω sq -1 .

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Abstract

The invention relates to a preparation method of three-dimensional porous graphene, which comprises the following steps: preparing a graphene oxide water solution through a modified Hummers method; mixing the graphene oxide water solution and toluene-soluble asphalt, performing hydrothermal reaction at 160-240 DEG C for 8-15 hours, cooling, washing, and drying; and under the protection of inert gas, performing heat treatment on the dried sample at 900-1100 DEG C for 0.5-3 hours, and cooling to obtain the cylindrical solid three-dimensional porous graphene. The preparation method of the graphene material having a porous structure has the advantages that the process is simple, the course is easy to control, the interfacial resistance of the graphene is greatly reduced, and the conductivity of the material is excellent.

Description

technical field [0001] The present invention relates to a repair of graphene, in particular to a method for repairing graphene oxide with mesophase pitch, and obtains a method for preparing three-dimensional graphene with a multi-level porous structure, which is used to reduce the interface resistance of graphene and improve the conductivity of graphene performance. Background technique [0002] Graphene is a new type of carbon material with a two-dimensional honeycomb crystal structure formed by densely packed single-layer carbon atoms. , three-dimensional graphite) basic unit. Graphene materials have excellent electrical properties and are expected to be used to manufacture a new generation of high-performance electronic devices. Last year, IBM in the United States successfully developed the first integrated circuit made of graphene wafers, marking another step towards the development of graphene computers. Graphene also has rich optical properties and is a good transpa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 黄富强仲亚娟
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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