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Method for preparing lithium ion battery anode material

A technology for lithium ion batteries and positive electrode materials, which is applied in the field of preparation of battery positive electrode materials, can solve the problems of complicated sintering methods and unfavorable industrialized production of spinel lithium manganate.

Active Publication Date: 2011-07-20
TSINGHUA UNIV +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

This multi-step sintering method is relatively complicated, which is not conducive to the industrial production of spinel lithium manganate

Method used

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  • Method for preparing lithium ion battery anode material
  • Method for preparing lithium ion battery anode material
  • Method for preparing lithium ion battery anode material

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Embodiment Construction

[0012] The positive electrode material and preparation method of the lithium ion battery according to the embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0013] see figure 1 , the embodiment of the present invention provides a kind of preparation method of lithium-ion battery cathode material, it comprises the following steps:

[0014] S1, providing MnOOH and lithium source;

[0015] S2, uniformly mixing the MnOOH and the lithium source in a liquid phase solvent;

[0016] S3, drying the mixed product, evaporating the liquid solvent to obtain a precursor; and

[0017] S4, heating the precursor from room temperature to a sintering temperature of 500° C. to 900° C. at a constant speed, and sintering at the sintering temperature for 3 to 24 hours to obtain spinel lithium manganate.

[0018] In the above step S1, the lithium source may be lithium salt, lithium hydroxide (LiOH) or a mixture of lithium salt and...

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Abstract

The invention relates to a method for preparing a lithium ion battery anode material. The method comprises the following steps of: providing hydroxy manganese oxide and lithium source; uniformly mixing the hydroxy manganese oxide and the lithium source in a liquid phase solvent; drying the mixed product, and evaporating the liquid phase solvent to obtain a precursor; and uniformly heating the precursor to the sintering temperature of between 500 and 900 DEG C from room temperature, and sintering the precursor for 3 to 24 hours at the sintering temperature to obtain spinel lithium manganate.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a battery, in particular to a preparation method of a positive electrode material of a lithium ion battery. Background technique [0002] The positive electrode materials of traditional lithium-ion batteries mainly include transition metal oxides, such as lithium cobaltate, lithium nickelate, lithium vanadate, lithium manganate, etc. Among them, lithium cobalt oxide has relatively stable performance and high capacity, so it occupies a dominant position in the cathode material of lithium-ion batteries. However, due to the lack of cobalt resources on the earth and the high toxicity of cobalt, from the perspective of economy and environmental protection, it is currently necessary to find lithium-ion battery cathode materials that can replace lithium cobalt oxide. Among many alternative materials, spinel lithium manganese oxide (LiMn 2 o 4 ) has become one of the most prom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1391H01M4/505
CPCC01P2004/16Y02E60/122C01G45/1242C01P2002/32H01M4/131C01P2006/40H01M10/052C01G45/02C01P2004/03B82Y30/00H01M4/505Y02E60/10
Inventor 李亚栋肖小玲王定胜
Owner TSINGHUA UNIV
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