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A kind of preparation method of graphene-graphite ball composite material

A technology of composite materials and graphite balls, applied in electrical components, battery electrodes, non-aqueous electrolyte batteries, etc., can solve the problems of difficult dispersion of graphene and incomplete reduction of graphene oxide, etc., to achieve good coating, avoid pollution and Oxidation process, effect of high conductivity

Active Publication Date: 2018-02-27
福建省辉锐材料科技有限公司
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Problems solved by technology

This method solves the problem that graphene is difficult to disperse, but brings the problem of incomplete reduction of graphene oxide

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0014] Described preparation method comprises the steps:

[0015] 1. Treat the artificial graphite ball raw material with hydrogen at high temperature, etch the amorphous structure on the surface of the graphite ball to obtain the surface of the graphitized structure.

[0016] 2. At high temperature, use the catalytic metal with a porous structure to crack hydrocarbon gas to obtain carbon free radicals in the gas phase. These carbon free radicals are deposited on the graphitized surface of graphite spheres, and high-quality graphene is grown in situ, thereby producing Obtained graphene-graphite sphere composite material. In the embodiment of the present invention, the catalytic metal of the porous structure may be copper or nickel.

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Abstract

The invention is appropriate for the technical field of chemosynthesis, and provides a preparation method of a graphene-graphite nodule composite material. Through a stereometric chemical vapor decomposition method, porous catalytic metal is used for cracking hydrocarbon gas at high temperature so as to obtain carbon free radicals of gas phase, and the carbon free radicals depositing on the graphitizing surface of graphite nodules grow graphene in situ on the surface of the graphite nodules, so that the graphene-graphite nodule composite material is prepared. According to the preparation method provided by the invention, a large quantity of graphene-graphite nodule composite materials can be prepared, the conductivity of the obtained graphene is high, the coating on the graphite nodules is good, pollution and oxidation process during various liquid phase treating are avoided, and thus high conductivity graphene is obtained.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis and relates to graphene, in particular to a method for preparing a graphene-graphite sphere composite material. Background technique [0002] At present, more than 80% of lithium batteries use natural graphite balls or artificial graphite balls, and graphitized carbon materials are still the mainstream of lithium battery negative electrode materials. However, in terms of lithium reserves and electronic conductivity, there is still a lot of room for improvement in the natural graphite spheres and artificial graphite spheres currently used. [0003] Graphene is a two-dimensional material with a single atomic layer. It has a large specific surface area (2630m2 / g), good electrical conductivity and thermal conductivity, and is a potential energy storage material. If the single-layer graphene is arranged in a disorderly manner, then both surfaces of the graphene can bind lithium ions, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583
CPCH01M4/366H01M4/587H01M10/052Y02E60/10
Inventor 林朝晖
Owner 福建省辉锐材料科技有限公司
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