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Graphene lithium battery material and preparation method thereof

A lithium battery material, graphene technology, applied in battery electrodes, secondary batteries, circuits, etc., to achieve excellent electrical conductivity, long service life, and good compatibility

Active Publication Date: 2018-01-09
广西蓝凯新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the existing lithium batteries, the present invention provides a graphene lithium battery material and a preparation method thereof

Method used

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  • Graphene lithium battery material and preparation method thereof

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Embodiment 1

[0025] A graphene lithium battery material, comprising the following raw materials in parts by weight: 100 parts of lithium titanate, 5 parts of three-dimensional graphene, 1.5 parts of rosin resin binder, 1 part of lanthanum oxide rare earth compound, octylphenol polyoxyethylene ether 3 parts of dispersant, 2 parts of lauryl alcohol polyvinyl ether defoamer and 30 parts of ethanol.

[0026] Its preparation method comprises the following steps:

[0027] (1) Add dispersant, defoamer and graphene into an ultrasonic stirrer, then add an organic solvent, and ultrasonically stir for 60 minutes at a frequency of 50kHZ to obtain a graphene dispersion;

[0028] (2) Add the graphene dispersion into the stirrer, then add the binder, stir for 15min at a speed of 200r / min, finally add lanthanum oxide and lithium titanate, and continue stirring for 1h. Vacuum drying at 70°C to obtain the graphene lithium battery material.

Embodiment 2

[0030] A graphene lithium battery material, comprising the following raw materials in parts by weight: 100 parts of lithium titanate, 4 parts of three-dimensional graphene, 0.5 parts of epoxy resin binder, 1 part of polyacrylate binder, cerium nitrate rare earth compound 0.8 parts, 4 parts of sodium metasilicate pentahydrate dispersant, 1.5 parts of nonylphenol polyoxyethylene ether defoamer and 40 parts of acetone.

[0031] Its preparation method comprises the following steps:

[0032] (1) Add dispersant, defoamer and graphene into an ultrasonic stirrer, then add an organic solvent, and ultrasonically stir for 45 minutes at a frequency of 40kHZ to obtain a graphene dispersion;

[0033] (2) Add the graphene dispersion into the stirrer, then add the binder, stir for 20min at a speed of 150r / min, and finally add cerium nitrate and lithium titanate, and continue stirring for 1.5h. Vacuum drying at 80°C to obtain the graphene lithium battery material.

Embodiment 3

[0035] A graphene lithium battery material, comprising the following raw materials in parts by weight: 100 parts of lithium titanate, 3 parts of three-dimensional graphene, 1.5 parts of ethylene-acrylic acid copolymer binder, 1 part of lanthanum sulfate rare earth compound, silicon metasilicon pentahydrate A dispersant mixture of 2 parts of sodium naphthalene sulfonate and 1 part of sodium alkylnaphthalene sulfonate, 1.5 parts of polyoxyethylene polyoxypropylene pentaerythritol ether defoamer and 35 parts of ethyl acetate.

[0036] Its preparation method comprises the following steps:

[0037] (1) Add dispersant, defoamer and graphene into an ultrasonic stirrer, then add an organic solvent, and ultrasonically stir for 30 minutes at a frequency of 60kHZ to obtain a graphene dispersion;

[0038] (2) Add the graphene dispersion into the stirrer, then add the binder, stir for 10min at a speed of 300r / min, and finally add lanthanum sulfate and lithium titanate, and continue stirrin...

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Abstract

The invention discloses a graphene lithium battery material and a preparation method thereof. The battery material comprises the following raw materials based on part by weight: 100 parts of lithium titanate, 3-6 parts of graphene, 0.5-2 parts of binding agent, 0.5-1.5 parts of rare-earth compound, 2-5 parts of dispersing agent, 1-3 parts of defoaming agent and 30-50 parts of organic solvent. In the prepared graphene lithium battery, the graphene and other constituents can be mixed and dispersed very well, each constituent is good in compatibility, the battery has the advantages of large electrical capacity, excellent conductivity, long service lifetime, no heat generation during the charge-discharge process and the like, the preparation process is simple, industrial production is easy toimplement, and the battery has relatively good economic benefit and social benefit.

Description

technical field [0001] The invention belongs to the technical field of battery materials, in particular to a graphene lithium battery material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have excellent properties such as high specific energy, no memory effect, and environmental friendliness, and have been widely used in portable mobile appliances such as mobile phones and notebook computers. As a power battery, lithium-ion batteries also have broad application prospects in electric bicycles and electric vehicles. Although lithium-ion batteries have a high specific capacity, it is often difficult to give full play to their charge and discharge capabilities after they are made into batteries. The main reason is that the high internal resistance of the electrode leads to poor electron conductivity, so conductive additives need to be added in the electrode preparation. Prior art conductive additives are mainly conductive graphite, acet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/0525
CPCY02E60/10
Inventor 姚万田肖华东姚翔黄晓峰苏丹萍黄润秋
Owner 广西蓝凯新能源有限公司
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