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Graphene conductive paste for lithium battery and preparation method thereof

A technology of conductive paste and graphene, applied in battery electrodes, lithium storage batteries, non-aqueous electrolyte storage batteries, etc., can solve the problems of poor conductivity of conductive paste, poor dispersion of graphene, short battery cycle life, etc., and achieve excellent dispersion Performance, improved compatibility, good dispersion effect

Inactive Publication Date: 2018-12-28
何亚龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at problems such as poor dispersion of graphene in the current battery conductive slurry, which leads to poor conductivity of the conductive slurry, short cycle life and poor stability of the prepared battery, and provides a graphene conductive slurry for lithium batteries and a preparation method thereof

Method used

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  • Graphene conductive paste for lithium battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] A graphene conductive paste for lithium batteries, consisting of the following raw materials in parts by weight: 50 parts of graphene, 3 parts of rare earth mixture, 6 parts of molybdenum oxide, 4 parts of cobalt oxide, 150 parts of polyethylene glycol, polyoxygen 4 parts of ethylene stearate, 3 parts of polyoxyethylene glycerol borate fatty acid ester, 3 parts of laurylphenol polyoxyethylene ether and 6 parts of decamethylcyclopentasiloxane. The rare earth mixture is composed of lanthanum, yttrium and samarium in a mass ratio of 1.5:0.5:1.

[0027] The preparation of the conductive paste in this example grinds the raw materials to 200 mesh before weighing the raw materials of each component. The preparation process includes the following steps:

[0028] S1: According to the ratio of parts by weight, graphene, polyoxyethylene stearate, polyoxyethylene glycerol borate fatty acid ester, dodecylphenol polyoxyethylene ether and decamethylcyclopentasilicate Add 100 parts of...

Embodiment 2

[0032] A graphene conductive paste for lithium batteries, consisting of the following raw materials in parts by weight: 45 parts of graphene, 4 parts of rare earth mixture, 5 parts of molybdenum oxide, 3 parts of cobalt oxide, 100 parts of dimethyl sulfoxide, polyoxygen 5 parts of ethylene stearate, 3 parts of polyoxyethylene glycerol borate fatty acid ester, 5 parts of laurylphenol polyoxyethylene ether and 4 parts of decamethylcyclopentasiloxane. The rare earth mixture is composed of lanthanum, yttrium and samarium in a mass ratio of 2.5:1:0.5.

[0033] The preparation of the conductive paste in this example grinds the raw materials to 150 mesh before weighing the raw materials of each component. The preparation process includes the following steps:

[0034] S1: According to the ratio of parts by weight, graphene, polyoxyethylene stearate, polyoxyethylene glycerol borate fatty acid ester, dodecylphenol polyoxyethylene ether and decamethylcyclopentasilicate Add 80 parts of o...

Embodiment 3

[0038] A graphene conductive paste for lithium batteries, consisting of the following raw materials in parts by weight: 55 parts of graphene, 5 parts of rare earth mixture, 7 parts of molybdenum oxide, 2 parts of cobalt oxide, 180 parts of ethanol, polyoxyethylene stearin 8 parts of acid ester, 2.5 parts of polyoxyethylene glycerol borate fatty acid ester, 4 parts of dodecylphenol polyoxyethylene ether and 7 parts of decamethylcyclopentasiloxane. The rare earth mixture is composed of lanthanum, yttrium and samarium in a mass ratio of 3:1:1.

[0039] The preparation of the conductive paste in this example grinds the raw materials to 250 mesh before weighing the raw materials of each component. The preparation process includes the following steps:

[0040] S1: According to the ratio of parts by weight, graphene, polyoxyethylene stearate, polyoxyethylene glycerol borate fatty acid ester, dodecylphenol polyoxyethylene ether and decamethylcyclopentasilicate Add 150 parts of oxane ...

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Abstract

The invention discloses a graphene conductive paste for a lithium battery and a preparation method thereof, wherein the conductive paste is composed of the following raw materials in parts by weight:graphene 40-60 part, rare earth mixture 3-5 part, molybdenum oxide 4-8 part, cobalt oxide 2-5 part, solvent 100-200 part, polyoxyethylene stearate 5-10 part of polyoxyethylene glycerol borate fatty acid ester 2-5 part of dodecyl phenol polyoxyethylene ether 1-6 part of decamethylcyclopentasiloxane 4-8 copy. The battery conductive paste provided by the invention has the advantages of excellent conductivity, small resistance, long service life, no heat in the charging and discharging process, good dispersibility, simple preparation process and the like, and is easy to realize industrial production.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a graphene conductive paste for lithium batteries and a preparation method thereof. Background technique [0002] As a new type of high-energy secondary power supply, lithium battery has the advantages of large specific energy, stable discharge voltage, high voltage, good low temperature performance, no pollution, superior safety performance, long storage and working life, and high utilization rate. However, lithium batteries in the prior art mainly use conductive graphite, acetylene black and carbon nanotubes as the conductive paste. Acetylene black is a chain of spherical amorphous carbon particles, and is currently the most widely used conductive paste. The price is low, but in order to achieve the purpose of enhancing the contact between the electrode active materials, the amount of addition required is large, resulting in a decrease in electrode capacity; carbon nanotubes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/052
CPCH01M4/62H01M4/625H01M10/052Y02E60/10
Inventor 何亚龙
Owner 何亚龙