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Lithium ion battery negative electrode

A lithium-ion battery and negative electrode technology, which is applied in battery electrodes, negative electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of lithium-ion battery safety and electrochemical performance, battery performance limitations, and the development of lithium-ion batteries. , to improve the cycle life and rate performance, improve the lithium dendrite problem, and increase the energy density

Inactive Publication Date: 2020-12-18
SHUANGDENG GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But when the ambient temperature is low, the performance of the battery will be limited, which greatly affects the development of lithium-ion batteries
[0003] In conventional industrial production, graphite materials are mainly used as negative electrodes, but the safety and electrochemical performance of lithium-ion batteries are affected due to the problems of lithium ion intercalation and lithium dendrites in graphite.

Method used

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  • Lithium ion battery negative electrode

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Effect test

Embodiment 1

[0019] Ion battery negative electrode formula according to the following components by mass percentage: the negative electrode active material is MnO 2 High temperature carbonization 70%, conductive agent is acetylene black 15%, binder is sodium carboxymethyl cellulose and styrene-butadiene rubber 15%.

Embodiment 2

[0021] The negative electrode formulation of the ion battery is composed of the following mass percentages: the negative electrode active material is SiO x High temperature carbonization 80%, conductive agent is acetylene black 10%, binder is polyvinylidene fluoride 10%.

Embodiment 3

[0023] The negative electrode formulation of the ion battery is composed of the following mass percentages: the negative electrode active material is TiO 2 High-temperature carbonization is 75%, the conductive agent is conductive carbon black 10%, and the binder is sodium carboxymethyl cellulose and styrene-butadiene rubber 15%.

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Abstract

The invention discloses a lithium ion battery negative electrode. The lithium ion battery negative electrode comprises, by mass, 70% to 80% of a negative electrode active material, 10% to 15% of a conductive agent, and 10% to 15% of a binder, and the negative electrode active material is a composite material obtained after oxide carbonization. The composite material of the oxide and the carbon isused as the negative electrode active material to replace traditional graphite, so that the problems of lithium ion intercalation and lithium dendrites caused by the graphite are avoided, the energy density of the battery is improved, the cycle life of the battery is prolonged, and the rate capability of the battery is improved.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a lithium ion battery negative electrode. Background technique [0002] Energy occupies an important position in human life, but fossil energy has problems such as environmental pollution and resource depletion, so renewable energy has gradually developed. Due to the advantages of high energy density and high cycle life, lithium-ion batteries are widely used in power, communication, energy storage and other fields. But when the ambient temperature is low, the performance of the battery will be limited, which greatly affects the development of lithium-ion batteries. [0003] In conventional industrial production, graphite materials are mainly used as negative electrodes, but the safety and electrochemical performance of lithium-ion batteries are affected due to the problems of lithium ion intercalation and lithium dendrites in graphite. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/36H01M4/48H01M4/583H01M4/62H01M10/0525
CPCH01M4/13H01M4/362H01M4/483H01M4/583H01M4/621H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 李恩雨蔡先玉楼志强徐斌
Owner SHUANGDENG GRP