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A kind of lithium ion battery electrode material and preparation method thereof, lithium ion battery

A lithium-ion battery and electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of product electrochemical performance improvement, cumbersome preparation process of pole pieces, etc., to improve electrical conductivity, improve electrochemical performance, The effect of good electron conductivity

Active Publication Date: 2022-02-22
贵州嘉盈科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of the molybdenum disulfide composite material disclosed in the above technology still has some shortcomings, such as the preparation of the material and the subsequent pole piece preparation process are cumbersome, additional binders and conductive agents need to be added during the pole piece preparation, and the electrochemical performance of the product There is still room for improvement

Method used

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  • A kind of lithium ion battery electrode material and preparation method thereof, lithium ion battery
  • A kind of lithium ion battery electrode material and preparation method thereof, lithium ion battery
  • A kind of lithium ion battery electrode material and preparation method thereof, lithium ion battery

Examples

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Embodiment 1

[0031] A method of preparing a lithium ion battery electrode material, comprising the steps of:

[0032] 1) Preparation of the oxide dispersion: First, in an ice bath condition, 4G graphite powder and 2gnano were added to 150 ml of concentrated sulfuric acid. 3 , Slowly join 10GKMNO 4 The reaction was stirred at room temperature for 6 days; then, the step S1 obtained was diluted with a 280 ml mass concentration of 5%, and the reaction was continued for 2 h, heated to 90 ° C. After the reaction was completed, 10 ml of mass concentration was 30% h. 2 O 2 Reduced excess KMNO 4 At the end, the resulting product was removed with a volume ratio of 1: 10 dilute hydrochloric acid and deionized water to obtain an graphite, and the graphite ultrasound was dispersed in water to obtain an oxide dispersion of 1 g / L of a concentration of 1 g / L. ;

[0033]2) Preparation of polystyrene sulfonic acid dispersion: Polystyrene sulfonic acid dispersion: Solidity is dispersed in water in water, res...

Embodiment 2

[0038] Unlike Example 1, the concentration of the graphene dispersion is 0.5 g / L.

[0039] The rest is not described herein again.

Embodiment 3

[0041] Unlike Example 1, the concentration of the graphene dispersion is 2 g / L.

[0042] The rest is not described herein again.

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Abstract

The invention belongs to the technical field of lithium ion batteries, and relates to a preparation method of an electrode material of a lithium ion battery, comprising steps: S1, respectively preparing graphene oxide dispersion liquid and poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate Acid dispersion, take equal volumes of the two dispersions and ultrasonically disperse to obtain a mixed dispersion; S2, add soluble molybdate and L-cysteine ​​to the mixed dispersion, ultrasonically make the dispersion uniform, and place in a hydrothermal reaction Reaction in the kettle, cleaning the resulting product to obtain a composite hydrogel of molybdenum disulfide, graphene and poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid; S3, stirring and dispersing the composite hydrogel , and then coated on the copper foil current collector, dried and rolled to obtain a composite electrode of molybdenum disulfide, graphene and poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid. Compared with the prior art, the electrode material prepared by the invention has better electrical conductivity and electrochemical performance.

Description

Technical field [0001] The present invention belongs to the technical field of lithium ion batteries, and more particularly to a lithium ion battery electrode material and a preparation method thereof, a lithium ion battery. Background technique [0002] In recent years, lithium-ion batteries have been widely used in consumer electronics, electric vehicles and electric energy storage. At the same time, the market also provides more higher requirements for the performance of lithium-ion batteries, including higher energy density, faster charge and discharge performance, and longer cycle life. [0003] As an important part of the lithium ion battery, the negative electrode material determines the capacity, power, circulation, and the like of the battery. At present, the commercially commercialized lithium-ion battery negative electrode material is mainly artificial graphite, natural graphite (372mAh / g) of natural graphite (372mAh / g), and lithium titanate in cubic spine structur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1397H01M4/62H01M4/136H01M10/0525
CPCH01M4/1397H01M4/62H01M4/622H01M4/624H01M4/625H01M4/136H01M10/0525Y02E60/10
Inventor 葛昱胡清平陶芝勇黄泽伟曾坚义
Owner 贵州嘉盈科技有限公司