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Efficient graphene-based conductive additive and preparation method thereof

A conductive additive, graphene-based technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, to achieve the effect of simple and easy preparation method, less porous structure, and improved intrinsic conductivity

Active Publication Date: 2019-10-15
HANGZHOU GAOXI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the focus of this patent is to solve the problem of how to connect graphene and conductive carbon materials, and it does not involve the issue of how to make full use of the properties of graphene itself

Method used

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  • Efficient graphene-based conductive additive and preparation method thereof
  • Efficient graphene-based conductive additive and preparation method thereof
  • Efficient graphene-based conductive additive and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Mix the low DBP value nano carbon black and the high DBP value nano carbon black according to the mass ratio of 3:1, the DBP value of the high DBP value nano carbon black is 360, and the DBP value of the low DBP value nano carbon black is 240 ;

[0030] (2) 10 parts of step (1) gained mixed carbon black is added the aqueous dispersion of 50 mass parts graphene oxide, carry out high-speed shear dispersion by emulsifying homogenizer, the mass concentration of graphene oxide aqueous dispersion is 1%; Among them, the lateral size of graphene oxide is 1-5 μm, the vertical size is 0.3-1.2 nm, and the carbon-oxygen ratio is 2.5;

[0031] (3) Put the dispersion obtained in step (2) in a hydrothermal reaction kettle, react at 180° C. for 2 hours, cool to room temperature, take out the reactant and dry it by infrared to obtain a conductive additive.

[0032] Through the above steps, the graphene-based conductive additive is obtained. After testing, it is composed of reduced ...

Embodiment 2

[0034] (1) Mix the low DBP value nano carbon black and the high DBP value nano carbon black according to the mass ratio of 3:1, the DBP value of the high DBP value nano carbon black is 400, and the DBP value of the low DBP value nano carbon black is 240 ;

[0035](2) 10 parts of step (1) gained mixed carbon black is added the aqueous dispersion of 50 mass parts graphene oxide, carry out high-speed shear dispersion by emulsification homogenizer, the mass concentration of graphene oxide aqueous dispersion is 3%; Among them, the lateral size of graphene oxide is 1-5 μm, the vertical size is 0.3-1.2 nm, and the carbon-oxygen ratio is 2.5;

[0036] (3) Put the dispersion obtained in step (2) in a hydrothermal reaction kettle, react at 180° C. for 2 hours, cool to room temperature, take out the reactant and dry it by infrared to obtain a conductive additive.

[0037] Through the above steps, a graphene-based conductive additive is obtained, which is composed of reduced graphene oxi...

Embodiment 3

[0040] (1) Mix the low DBP value nano carbon black and the high DBP value nano carbon black according to the mass ratio of 3:1, the DBP value of the high DBP value nano carbon black is 380, and the DBP value of the low DBP value nano carbon black is 280 ;

[0041] (2) 10 parts of step (1) gained mixed carbon black is added the aqueous dispersion of 50 mass parts graphene oxide, carry out high-speed shear dispersion by emulsifying homogenizer, the mass concentration of graphene oxide aqueous dispersion is 6%; Among them, the lateral size of graphene oxide is 3-10 μm, the vertical size is 0.3-1.2 nm, and the carbon-oxygen ratio is 2.5;

[0042] (3) Put the dispersion obtained in step (2) in a hydrothermal reaction kettle, react at 180° C. for 2 hours, cool to room temperature, take out the reactant and dry it by infrared to obtain a conductive additive.

[0043] Through the above steps, a graphene-based conductive additive is obtained, which is composed of reduced graphene oxid...

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Abstract

The invention discloses an efficient graphene-based conductive additive and a preparation method thereof. Nano carbon black with a specific DBP value is selected and compounded with reduced graphene oxide in a specific ratio, and the nano carbon black with different DBP values is distributed in different regions of the surface of the reduced graphene oxide to form a unique nanocomposite structure,which exhibits excellent electrical conductivity. On one hand, the nano carbon black with the different DBP values repairs in-plane defects of graphene and improves the interfacial conductivity of graphene sheets and other materials, and on the other hand, the coverage of nano carbon black reduces the stacking among the graphene sheets and improves the dispersibility of the conductive additive.

Description

technical field [0001] The invention belongs to the field of conductive additives, in particular to a highly efficient graphene-based conductive additive and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional honeycomb nanomaterial composed of carbon atoms that was first discovered in 2004. In the graphene plane, the carbon atoms are all sp2 hybridized, forming a six-membered ring bond in the plane, and forming a large π bond that runs through the entire layer in the direction perpendicular to the layer plane, thus providing an excellent electron transfer condition. The researchers found that the carrier mobility of graphene at room temperature reached 15000 cm 2 / (V·s), which is more than twice that of indium telluride, the material with the highest carrier mobility, and the carrier mobility changes little with temperature, so it has a significant role in the fields of conductive materials and electronic materials. application poten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/194
CPCC01B32/184C01B32/194
Inventor 陈琛韩燚高超
Owner HANGZHOU GAOXI TECH CO LTD
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