Lithium ion battery and positive electrode material thereof

A lithium-ion battery and positive electrode material technology, applied in the field of new energy materials, can solve the problems of poor cycle performance and large specific surface area of ​​lithium-ion batteries, and achieve high practical application value, low cost, and slow capacity decay.
CN108075111AInactive Publication Date: 2018-05-25CONTEMPORARY AMPEREX TECH CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECH CO
Publication Date
2018-05-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a lithium ion battery and a positive electrode material thereof. The general chemical formula of the positive electrode material of the lithium ion battery is LiNixM[1-x]O2, wherein x is greater than or equal to 0.5 but smaller than 1; the M is one or more of Co, Mn, Al, Mg, Ti and Zr; the specific surface area of the positive electrode material of the lithium ion battery is 0.2 to 0.6m<2> / g; the surface lithium residue quantity is 200 to 1000 ppm. Compared with the prior art, the positive electrode material of the lithium ion battery is prepared through solid phase reaction; the surface lithium residue quantity of the material can be obviously reduced; the specific surface area increase of the positive electrode material of the lithium ion battery in the reaction process can also be avoided. The circulation stability of the positive electrode material of the lithium ion battery is good; the preparation method is simple; the implementation is easy; the production cost is low; good application prospects are realized. The invention also discloses the lithium ion battery.
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Description

technical field

[0001] The invention belongs to the field of new energy materials, more specifically, the invention relates to a lithium-ion battery with good cycle stability and its positive electrode material. Background technique

[0002] Lithium-ion batteries have been widely studied and widely used in mobile phones, portable computers, In mobile electronic devices such as video cameras and cameras, traditional batteries are also gradually replaced in the fields of aviation, aerospace, navigation, artificial satellites, small medical instruments and military communication equipment.

[0003] High-nickel materials have been widely used in lithium-ion battery cathode materials due to their high specific capacity. However, as the nickel content increases, the surface residual lithium (lithium hydroxide and lithium carbonate, etc.) of high-nickel materials is also more, and the surface residual lithium will directly affect the gas production of lithium-ion batteries during ...

Claims

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