Special graphene conductive agent for lithium battery

A technology of graphene and conductive agent, applied to battery electrodes, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of reducing the mechanical properties of conductive agents, unfavorable conductive agent applications, and reducing resin content, etc., to achieve Excellent performance, easy operation of preparation steps, and improved cycle life

Inactive Publication Date: 2013-12-25
SUZHOU AITESI FURTHER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the content of metal powder will not only cause a significant increase in cost, but also reduce the content of resin, thereby reducing the mechanical properties of the conductive agent, which is not conducive to the application of the conductive agent.

Method used

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  • Special graphene conductive agent for lithium battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In this embodiment, the mass parts of each raw material are as follows: 8 parts of graphene, 16 parts of acrylic resin, 32 parts of water, 6 parts of BYK wetting and dispersing agent, and 5 parts of tricarboxymethylpropane glycidyl ether. The preparation steps are as follows:

[0016] (1) Mix 8 parts of graphene with 12 parts of water to infiltrate the graphene to obtain a graphene premix;

[0017] (2) Mix 16 parts of acrylic resin with 20 parts of water to swell the resin to obtain a resin premix;

[0018] (3) Mix the graphene premix with the resin premix, add 6 parts of BYK wetting and dispersing agent, and 5 parts of tricarboxymethylpropane glycidyl ether, and stir evenly to obtain a finished product.

Embodiment 2

[0020] In this embodiment, the mass parts of each raw material are as follows: 13 parts of graphene, 22 parts of acrylic resin, 43 parts of ethanol, 8 parts of BYK wetting and dispersing agent, and 4 parts of tricarboxymethyl propane glycidyl ether. The preparation steps are as follows:

[0021] (1) Mix 13 parts of graphene with 15 parts of ethanol to infiltrate the graphene to obtain a graphene premix;

[0022] (2) Mix 22 parts of acrylic resin with 28 parts of ethanol to swell the resin to obtain a resin premix;

[0023] (3) Mix the graphene premix with the resin premix, add 8 parts of BYK wetting and dispersing agent, 4 parts of tricarboxymethylpropane glycidyl ether, and stir evenly to obtain a finished product.

Embodiment 3

[0025] In this embodiment, the mass parts array of each raw material is as follows: 18 parts of graphene, 28 parts of alkyd resin, 50 parts of acetone, 5 parts of BYK wetting and dispersing agent, and 8 parts of tricarboxymethyl propane glycidyl ether. The preparation steps are as follows:

[0026] (1) Mix 18 parts of graphene with 20 parts of acetone to infiltrate the graphene to obtain a graphene premix;

[0027] (2) Mix 28 parts of alkyd resin with 30 parts of acetone to swell the resin to obtain a resin premix;

[0028] (3) Mix the graphene premix with the resin premix, add 5 parts of BYK wetting dispersant and 8 parts of tricarboxymethylpropane glycidyl ether, and stir evenly to obtain a finished product.

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Abstract

The invention discloses a special graphene conductive agent for a lithium battery, which comprises the following components in parts by weight: 5-20 parts of graphene, 10-30 parts of resin, 20-50 parts of solvent, and 10-15 parts of auxiliary agent, wherein the resin is formed by one or two of acrylic resin and alkyd resin; the solvent is formed by mixing one or several of water, ethanol and acetone; the auxiliary agent comprises a dispersing agent and a diluent. According to the invention, the preparation steps are simple, convenient and easy to operate; the obtained special graphene conductive agent for the lithium battery is superior in performance, has the composite indicator superior to that of carbon nano tubes and carbon nanofibres, can remarkably increase the volume of electrode materials, reduces the battery internal resistance, and prolongs the battery cycle life, thereby being a new partner for the high-performance lithium battery.

Description

technical field [0001] The invention relates to a conductive agent, in particular to a special graphene conductive agent for lithium batteries. Background technique [0002] Graphene is a new type of carbon material discovered in 2004. It has many advantages and has broad application prospects in both theoretical research and engineering technology. Among its many advantages, conductivity is the more important one, which can be applied to the conductive agent of lithium batteries. [0003] Lithium batteries are relatively small in size and have higher requirements on the conductivity of the conductive agent. At present, the conductive performance is usually improved by increasing the metal powder content in the conductive agent. However, increasing the content of metal powder will not only cause a significant increase in cost, but also reduce the content of resin, thereby reducing the mechanical properties of the conductive agent, which is not conducive to the application ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01B1/22
CPCY02E60/10
Inventor 林耀朋张旭吴军
Owner SUZHOU AITESI FURTHER MATERIALS CO LTD
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