Preparation method of lithium battery electrode plate based on graphene-graphite nodule composite material
A composite material, graphite ball technology, applied in battery electrodes, electrode manufacturing, electrode current collector coating and other directions, can solve the problems of difficult dispersion of graphene, incomplete reduction of graphene oxide, etc., to improve performance and solve energy density. and the effect of insufficient power density
Active Publication Date: 2014-06-04
XIFENG 2D FUJIAN MATERIAL TECH CO LTD
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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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Experimental program
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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.
[0017] 3. Mix the obtained graphene-graphite sphere composite material with PVDF (polyvinylidene fluoride) binder, make a slurry and apply it directly or spin-coated to the surface of copper foil, then dry, compact and shear , to obtain a lithiu...
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Abstract
The invention provides a preparation method of a lithium battery electrode plate based on a graphene-graphite nodule composite material, and is suitable for the technical field of chemical synthesis. The preparation method utilizes a stereo chemical vapor deposition method and comprises the following steps of cracking hydrocarbon gas by a porous metal catalyst under a high temperature to obtain vapor-phase carbon free radicals, wherein the carbon free radicals deposit on graphitized surfaces of graphite nodules and in-situ grow graphene on the surfaces of the graphite nodules so as to prepare the graphene-graphite nodule composite material; mixing the obtained graphene-graphite nodule composite material with a PVDF adhesive to prepare a serous fluid, directly coating or rotationally coating the serous fluid on the surface of a copper foil, drying, compacting and shearing to obtain the lithium battery electrode plates. According to the preparation method of the lithium battery electrode plate based on the graphene-graphite nodule composite material, which is disclosed by the invention, the lithium battery electrode plates based on the graphene-graphite nodule composite material are capable of being prepared in large scale, so that the performances of negative electrode material of lithium battery are greatly improved, and the problems that the energy density and the power density of the lithium battery are insufficient at the present are solved.
Description
technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of a lithium battery electrode sheet based on 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 graphe...
Claims
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IPC IPC(8): H01M4/1393
CPCY02E60/122H01M4/0404H01M4/0428H01M4/1393H01M4/366H01M4/583Y02E60/10
Inventor 林朝晖
Owner XIFENG 2D FUJIAN MATERIAL TECH CO LTD