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Lithium battery special-purpose modified lithium titanate negative electrode material and preparation method thereof

A kind of lithium titanate, negative electrode material technology, applied in battery electrodes, circuits, electrical components and other directions, can solve the problems of low energy density, high price, battery consistency differences, etc., to achieve good safety performance, long life, good battery The effect of dynamic performance

Inactive Publication Date: 2014-01-22
HEFEI HENGNENG NEW ENERGY TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, there are also certain shortcomings, such as lower energy density compared to other types of lithium-ion power batteries; higher price than other types of lithium-ion power batteries; differences in battery consistency, etc., which need further research and development

Method used

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Embodiment Construction

[0009] The present invention will be described in detail below through specific examples.

[0010] A special modified lithium titanate negative electrode material for lithium batteries, made of the following raw materials in parts by weight (kg): lithium titanate 400, aluminum powder 3, neodymium 2, potassium chlorate 2, polyvinylpyrrolidone 4, modified silver powder 4, Appropriate amount of water;

[0011] The modified silver powder is made of the following raw materials in parts by weight (kg): silver powder 100, nano-carbon 2, tapioca starch 2, bauxite 2, diatomite 3, methyltriethoxysilane 1, silicon carbide 2 , aluminum nitride 1, ZnO1, Nb 2 o 5 1-2: Mix all raw materials evenly, heat to 50-55°C, grind for 1-2 hours, disperse evenly into powder, put into calciner and sinter at 510-530°C for 2-3 hours.

[0012] The special modified lithium titanate negative electrode material for lithium batteries of the present invention is characterized in that it is made by the follow...

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PUM

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Abstract

The invention discloses a lithium battery special-purpose modified lithium titanate negative electrode material which is characterized in that the material is prepared from the raw materials of, by weight: 400 parts of lithium titanate, 3-4 parts of aluminum powder, 2-3 parts of neodymium, 2-3 parts of potassium chlorate, 4-5 parts of polyvinylpyrrolidone, 4-5 parts of modification silver powder, and proper amount of water. According to the invention, the modification silver powder is added, such that such that product uniformity is improved, and the material is provided with good battery dynamic performance, good circulation performance, and good high-rate charge / discharge capacity. Therefore, the performance of a lithium ion battery with the material as the negative electrode is improved. Also, the material has the advantages of no toxicity, no pollution, good safety performance, wide raw material source, low price, long service life, and the like. Therefore, the material is suitable for industrialized productions.

Description

technical field [0001] The invention relates to the field of chemical energy materials, in particular to a special modified lithium titanate negative electrode material for lithium batteries and a preparation method thereof. Background technique [0002] Lithium titanate, as the anode material of lithium-ion batteries, has become the anode material of the new generation of lithium-ion batteries and is widely used in new energy vehicles, Electric motorcycles and applications requiring high safety, high stability and long cycle times. (1) It is a zero-strain material with good cycle performance (2) The discharge voltage is stable, and the electrolyte will not decompose, which improves the safety performance of lithium batteries; (3) Compared with carbon negative electrode materials, lithium titanate has high lithium ion Diffusion coefficient, high-rate charge and discharge, etc. (4) The potential of lithium titanate is higher than that of pure metal lithium, and it is not eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/62
CPCH01M4/364H01M4/485Y02E60/10
Inventor 林彭桃君蒋森陈夕顺
Owner HEFEI HENGNENG NEW ENERGY TECH
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