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A kind of graphene composite material and preparation method thereof

A composite material, graphene technology, applied in structural parts, electrical components, battery electrodes and other directions, can solve the problems of cumbersome preparation methods of graphene, cumbersome preparation methods, uneven preparation materials, etc., to avoid graphene agglomeration phenomenon, synthesis The process is simple, and it is beneficial to the effect of insertion and extraction

Active Publication Date: 2018-10-30
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the cumbersome and inhomogeneous problems of the graphene preparation method in the above-mentioned prior art, the present invention aims to provide a preparation method of graphene composite material
The preparation method of the graphene composite material provided by the present invention has simple equipment, simple steps, and easy operation. In addition, the preparation material is not suitable for strong acid and will not pollute the environment. Finally, an electrode with 2 to 10 layers of graphene coating is obtained. materials, which can solve the problems of cumbersome graphene preparation methods and inhomogeneous preparation materials in the prior art

Method used

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  • A kind of graphene composite material and preparation method thereof
  • A kind of graphene composite material and preparation method thereof
  • A kind of graphene composite material and preparation method thereof

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Effect test

Embodiment 1

[0034] Embodiment 1. Graphene composite material 1

[0035] as attached figure 1 As shown, embodiment 1 of the present invention provides a kind of preparation method of graphene composite material, specifically comprises the following steps:

[0036] (101), provide electrode material and graphite powder;

[0037] (102), mixing the electrode material and graphite powder with a mass ratio of 400:600-999:1;

[0038] (103), ball milling the mixed electrode material and graphite powder.

[0039] Specifically, 50 parts of titanium oxide and 50 parts of graphite powders whose composition is the synthetic raw material of oligolayer graphene are mixed, and after being mixed under an inert atmosphere with a pressure of 1 MPa, they are added into a stainless steel ball mill tank for ball milling, wherein the ball-to-material ratio is 20: 1. Therefore, 2000 parts of stainless steel balls need to be added, and the stainless steel ball milling tank is ball-milled at a speed of 100rpm / ...

Embodiment 2

[0040] Embodiment 2. Graphene composite material 2

[0041] Embodiment 2 of the present invention also provides a kind of preparation method of graphene composite material, and its preparation step is identical with embodiment 1, and difference is that 40 parts of titanium oxide and 60 parts of graphite powders that composition is raw material of oligolayer graphene are mixed, After mixing under an inert atmosphere with a pressure of 2MPa, add it to a stainless steel ball milling tank for ball milling, where the ball-to-material ratio is 20:1, so 2000 parts of stainless steel balls need to be added, and the stainless steel ball milling tank is ball milled at a speed of 200rpm / min After 50 hours, the finally obtained product after ball milling is the graphene composite material 2, that is, an electrode material covered with 2-10 layers of graphene. The steps described above were carried out in a glove box.

Embodiment 3

[0042] Embodiment 3. Graphene composite material 3

[0043] Embodiment 3 of the present invention also provides a kind of preparation method of graphene composite material, and its preparation step is identical with embodiment 1, and difference is that 90 parts of lithium manganate and 10 parts of graphite powders whose composition is the synthetic raw material of oligolayer graphene are mixed , after mixing under an inert atmosphere with a pressure of 1.5MPa, add it into a stainless steel ball mill tank for ball milling, wherein the ball-to-material ratio is 20:1, so 2000 parts of stainless steel balls need to be added, and the stainless steel ball mill tank is rotated at a speed of 150rpm / min After ball milling for 100 hours, the finally obtained product after ball milling is the graphene composite material 3, that is, an electrode material coated with 2-10 layers of graphene. The steps described above were carried out in a glove box.

[0044] attached by figure 2 Shown i...

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Abstract

The present invention relates to a preparation method of a graphene composite material, and the method comprises the following stesp: providing an electrode material and graphite powder; mixing the electrode material and the graphite powder in a mass ratio of 400: 600-999: 1; and ball-milling the mixture of the electrode material and the graphite powder. In the preparation process, a few-layer-graphene-coated electrode material is formed to facilitate embedding and removal of lithium ions, conductive performance and cycle performance of lithium ion battery electrode materials can be improved, and the overall electrochemical properties of lithium-ion batteries can be greatly improved. At the same time, the graphene composite material is low in cost and is suitable for mass production and application.

Description

technical field [0001] The invention relates to the technical field of preparation of electrode materials, in particular to a preparation method of a graphene composite material. Background technique [0002] Graphene is a two-dimensional lattice structure in which carbon atoms are arranged in a hexagonal manner, and is a flat material with a single layer of carbon atoms. Since Andre K. Geim et al. prepared graphene by mechanically exfoliating graphite flakes in 2004, graphene has attracted more and more attention from researchers due to its unique nanostructure and characteristics. Because of the unique two-dimensional structure of graphene, its atoms are exposed to the surface layer, and it has a very high specific surface area (~2600m 2 g -1 ) and good mechanical and electrical properties, so it is used as a base material for fixed electrode materials by researchers. The composite material of this electrode material and graphene can significantly enhance the electroch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/587H01M4/133
CPCY02E60/10
Inventor 戚雯武英况春江周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD