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A kind of graphene composite conductive powder and preparation method thereof

A graphene composite and conductive powder technology, applied in graphene, chemical instruments and methods, circuits, etc., can solve problems such as easy agglomeration, difficult dispersion, and reduced dispersion

Active Publication Date: 2018-05-15
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the degree of agglomeration of the graphene composite conductive powder obtained by this preparation method is reduced and the dispersibility is improved, the graphene composite conductive powder is still easy to agglomerate and difficult to disperse in a solvent, which is still unfavorable for its Application in downstream products

Method used

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  • A kind of graphene composite conductive powder and preparation method thereof
  • A kind of graphene composite conductive powder and preparation method thereof
  • A kind of graphene composite conductive powder and preparation method thereof

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preparation example Construction

[0033] The application also provides a preparation method of graphene composite conductive powder, comprising the following steps:

[0034] Mixing graphene material, polypyridine compound and water to obtain graphene water-based slurry;

[0035] Mixing the conductive carbon material, the carboxyl-containing compound and water to obtain a conductive carbon water-based slurry, the conductive carbon material does not include graphene;

[0036] Mixing the graphene water-based slurry with the conductive carbon water-based slurry, hydrogen bond self-assembly to obtain a self-assembled intermediate slurry;

[0037] The self-assembly intermediate slurry is dried to obtain a graphene composite conductive powder.

[0038] In the process of preparing the graphene composite conductive powder, the applicant first prepares the graphene aqueous slurry. The present application is not limited to the source and preparation method of the graphene, and the graphene products well-known to those ...

Embodiment 1

[0055] The graphene water-based slurry that mass concentration is 2% and the conductive carbon water-based slurry that mass concentration is 4% are prepared respectively:

[0056] a) preparation of graphene material water-based slurry with a mass concentration of 2%: take 40Kg of a graphene water-based slurry with a mass concentration of 5%, and weigh it according to the mass ratio of graphene material and polypyridine compound material at 1:0.1 0.2Kg of 4'-(4-methylphenyl)-2,2:6',2"-terpyridine was added to the above graphene aqueous slurry, diluted with water until the graphene content was 2%, and the above mixed The material is stirred and dispersed evenly;

[0057] b) The preparation of conductive carbon water-based slurry with a mass concentration of 4%: take 2kg of conductive carbon black SP-Li for lithium batteries, and take 0.1kg of polycarbonate according to the mass ratio of conductive carbon material and carboxyl compound as 1:0.05. Acrylic acid, add a certain amou...

Embodiment 2

[0063] Prepare the graphene material water-based slurry with a mass concentration of 0.1% and the conductive carbon water-based slurry with a mass concentration of 6% respectively:

[0064] a) preparation of graphene material water-based slurry with a mass concentration of 0.1%: take 40Kg of a graphene water-based slurry with a mass concentration of 5%, and take by weighing 1:0.01 according to the mass ratio of graphene material and polypyridine compound material 0.02Kg of dipyridin-4amine is added to the above-mentioned graphene aqueous slurry, diluted with water until the graphene content is 0.1%, and the above-mentioned mixture is stirred and dispersed evenly;

[0065] b) Preparation of conductive carbon water-based slurry with a mass concentration of 6%: Weigh 0.2kg of conductive carbon black SP-Li for lithium batteries, and weigh 0.2kg of conductive carbon black SP-Li according to the mass ratio of conductive carbon material and carboxyl compound as 1:1. 3,5-dinitrobenzoi...

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Abstract

The invention provides graphene compound conductive powder obtained through hydrogen bond self-assembly of a graphene material and a conductive carbon material. A polypyridine compound is adsorbed on the surface of the graphene material, a carboxyl compound is adsorbed on the surface of the conductive carbon material, and the conductive carbon material contains no graphene. In the graphene compound conductive powder, the surface of the graphene material is uniformly covered with the conductive carbon material, so the adjacent graphene materials are separated by the conductive carbon material, and the dispersity of the graphene compound conductive powder in a solvent is effectively enhanced. The invention further provides a preparation method of the graphene compound conductive powder.

Description

technical field [0001] The invention relates to the technical field of graphene materials, in particular to a graphene composite conductive powder and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional material with a single-layer sheet structure composed of carbon atoms and a thickness of only one carbon atom. Graphene has shown excellent performance in many aspects. For example, graphene is almost completely transparent, absorbing only 2.3% of light, and its light transmission is very good; the thermal conductivity of graphene is as high as 5300W / m K, which is higher than that of carbon. Nanotubes and diamonds; the electron mobility of graphene at room temperature exceeds 15,000 cm 2 / V s, which is higher than that of carbon nanotubes and silicon crystals; the resistivity of graphene is only 10- 6 Ω·cm, lower than copper or silver, is currently the material with the smallest resistivity; in addition, graphene is also the thinnest bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/62H01M10/0525H01M4/36C01B32/194C01B32/168
CPCC01B2204/22Y02E60/10
Inventor 秦志鸿周旭峰刘兆平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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