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Graphene composite material and preparation method thereof

A composite material and graphene technology, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of uneven preparation materials, cumbersome preparation methods, and cumbersome preparation methods of graphene, so as to avoid the phenomenon of graphene agglomeration and improve the synthesis process. Simple, favorable insertion and extraction effects

Active Publication Date: 2016-06-08
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Graphene composite material and preparation method thereof
  • Graphene composite material and preparation method thereof
  • Graphene composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] Example 1. Graphene Composite 1

[0035] as attached figure 1 As shown, Embodiment 1 of the present invention provides a method for preparing a graphene composite material, which specifically includes the following steps:

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

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

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

[0039] Concretely, 50 parts of titanium oxides and 50 parts of graphite powders that are composed of oligolayer graphene synthetic raw materials are mixed, and after mixing under the inert atmosphere of 1MPa, the pressure is added into the stainless steel ball mill and ball milled, 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 for 20 hours at a rotating speed of 100 rpm / min. Finally, t...

Embodiment 2

[0040] Example 2. Graphene Composite 2

[0041] Embodiment 2 of the present invention also provides a method for preparing a graphene composite material, and the preparation steps are the same as those in Embodiment 1, except that 40 parts of titanium oxide and 60 parts of graphite powder whose composition is a raw material for synthesizing few-layer graphene are mixed, After mixing under an inert atmosphere with a pressure of 2MPa, add it to a stainless steel ball mill for ball milling, wherein the ratio of ball to material is 20:1, so 2000 parts of stainless steel balls need to be added, and the stainless steel ball mill is ball-milled at a rotational speed of 200rpm / min After 50 hours, the ball-milled product finally obtained is the graphene composite material 2, that is, the electrode material having 2-10 layers of graphene coating. The steps described above were performed in a glove box.

Embodiment 3

[0042] Example 3. Graphene Composite 3

[0043] Embodiment 3 of the present invention also provides a method for preparing a graphene composite material, and the preparation steps are the same as those in Embodiment 1, except that 90 parts of lithium manganate and 10 parts of graphite powder whose composition is a raw material for oligolayer graphene are mixed , after mixing in an inert atmosphere with a pressure of 1.5MPa, add it to 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 150rpm / min. The ball-milling is performed for 100 hours, and the finally obtained product after ball-milling is the graphene composite material 3, that is, an electrode material having 2-10 layers of graphene coating. The steps described above were performed in a glove box.

[0044] attached by figure 2 As shown, it is the electron microscope ...

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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 single-layer carbon atom plane material. Since Andre K.Geim et al. prepared graphene by mechanical exfoliation of graphene sheets 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 matrix material for fixing electrode materials by researchers. This composite of electrode material and graphene can significantly enhance the electrochemical performance of...

Claims

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Application Information

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Patent Type & Authority Applications(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
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