Lithium ion battery and cathode material thereof

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of not being able to improve the high-temperature storage performance of the battery, and not being able to obtain battery performance, so as to improve the structure and cycle stability and improve the high temperature Storage performance and safety performance, the effect of low and high temperature swelling
CN102544481AActive Publication Date: 2012-07-04DONGGUAN AMPEREX TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGGUAN AMPEREX TECH
Publication Date
2012-07-04

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Abstract

The invention provides a lithium ion battery cathode material, which is applicable to high charge cut-off voltage conditions, and consists of two active substances of LiCoO2 and Li (Ni xCoyMn1-x-y) O2, wherein x is not smaller than 0.3 and is not larger than 0.8, y is not smaller than 0.1 and is not larger than 0.4, and x plus y is not smaller than 0.6 and is not larger than 0.9; both the LiCoO2 and the Li(NixCoyMn1-x-y) O2 are doped with an element M body phase and undergone surface coating of oxide M'Ox, wherein M is at least one of Mg, Ti, Al, Zr, B, La, Ce and Y; M' is at least one of Al, Ti, Mg, Zr, B2, Si and Fe; and the energy density of a lithium ion battery can be obviously improved after using the high voltage cathode material, and the cathode material has the advantages of excellent cycling performance, lower high temperature expansion and the like. In addition, the invention further discloses a lithium ion battery which comprises the cathode material.
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Description

technical field

[0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a lithium ion battery cathode material suitable for high charge cut-off voltage conditions and a high energy density lithium ion battery prepared therefrom. Background technique

[0002] Lithium-ion batteries have become one of the most widely used secondary batteries due to their advantages such as high energy density, good cycle performance, high operating voltage, and no memory effect. With the rapid development of electronic technology, people put forward higher energy density and longer cycle performance requirements for lithium-ion batteries. Therefore, the development of high-performance cathode materials is particularly important for the development of lithium-ion batteries.

[0003] Among the currently commercialized cathode materials for lithium-ion batteries, the most widely used and mature cathode material is lithium cobalt oxide (LiCoO 2 )...

Claims

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