A kind of graphene-metal oxide composite negative electrode material and preparation method thereof

A negative electrode material and oxide technology, which is applied in the field of graphene-metal oxide composite negative electrode materials and its preparation, can solve rare and other problems, and achieve the effects of increasing oxygen vacancies, improving electrical conductivity, and obvious electrical conductivity
CN105355877BActive Publication Date: 2017-07-11中炬高新材料股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
中炬高新材料股份有限公司
Publication Date
2017-07-11

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Abstract

The invention discloses a graphene-metal oxide composite negative electrode material and a preparation method therefor. The composite negative electrode material is mainly prepared from graphene and metal oxides. Graphene is employed as a three-dimensional network skeleton, metal oxides modified through layer-layer self assembly are employed as active substances, and a composite negative electrode material with oxygen deficiency is prepared. Compared with the prior art, the material can be prepared in conditions that the time is 3-10h and the temperature is 350-450 DEG C. The conductivity of the active substances is improved obviously, oxygen vacancy of the metal oxides can be increased greatly, and therefore the cycle performance of the composite material is improved greatly. In addition, the technology is simple, the repeatability is good, the cost is low, and the composite negative electrode material has a good large-scale application potential.
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Description

technical field

[0001] The invention relates to a graphene-metal oxide composite negative electrode material and a preparation method thereof, belonging to the technical field of lithium ion battery negative electrode materials. Background technique

[0002] Ion batteries have the advantages of high open circuit voltage, high energy density, long service life, no memory effect, less pollution, and low self-discharge rate. The most ideal power supply for equipment and electric vehicles. Although graphite, the negative electrode material of traditional lithium-ion batteries, has good cycle stability and high cost performance, due to its low charge-discharge specific capacity and no advantage in volume specific capacity, it is difficult to meet the high requirements of power systems, especially electric vehicles and hybrid electric vehicles. capacity requirements. Therefore, it is extremely urgent to develop new anode materials for lithium-ion batteries with high specific cap...

Claims

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