Germanium/carbon composite negative electrode material and preparation method thereof

A negative electrode material and carbon composite technology, applied in negative electrodes, battery electrodes, active material electrodes, etc., can solve problems such as low output and volume expansion
CN104659346AInactive Publication Date: 2015-05-27SHENZHEN CAPCHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENZHEN CAPCHEM TECH
Publication Date
2015-05-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a germanium / carbon composite negative electrode material and a preparation method thereof. The preparation method comprises the steps of carrying out ball milling and mixing on germanium dioxide and polyvinylpyrrolidone, annealing at a hydrogen atmosphere in the presence of argon, so as to prepare the germanium / carbon composite negative electrode material. When being used as a negative electrode material of a lithium ion battery, the germanium / carbon composite negative electrode material has the characteristics of good cycling stability and high multiplying power capacity.
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Description

technical field

[0001] The invention relates to the technical field of negative electrode materials for lithium ion batteries, in particular to a germanium / carbon composite negative electrode material and a preparation method thereof. Background technique

[0002] With the depletion of energy sources and the deterioration of the environment, the development of electric vehicles is imperative, for which countries have formulated relevant policies. One of the technical difficulties faced by the promotion of electric vehicles is the restriction of the storage capacity, that is, the battery capacity. Its capacity largely depends on the choice of electrode material. At present, the widely used negative electrode material is mainly graphite, its capacity is about 372mAh / g, and its potential is very close to that of metal lithium. The low capacity and poor safety of graphite materials restrict the development of lithium-ion batteries as power batteries. Therefore, the developmen...

Claims

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