High-voltage cathode material for lithium ion battery and preparation method thereof

A positive electrode material, lithium ion technology, applied in the field of positive electrode active materials for lithium ion secondary batteries and its preparation, can solve the problems of unsatisfactory cycle performance and high temperature performance of batteries, and achieve high energy density and good dissolution rate , Excellent effect of high temperature cycle performance
CN104022280AActive Publication Date: 2014-09-03NANTONG RESHINE NEW MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANTONG RESHINE NEW MATERIAL
Publication Date
2014-09-03
Patent Text Reader

Abstract

The invention discloses a high-voltage cathode material for a lithium ion battery. The high-voltage cathode material is a clad material, the core material has the general formula of [LiaNibCocMdO2]; the shell material has the general formula of [LipNixCoyMnzO2]; the cathode material of the lithium ion secondary battery has the general formula of[LiaNibCocMdO2] [LipNixCoyMnzO2]; the content of the core material is 50-99.5wt%, the content of the shell material is 0.05-50wt%. The preparation method comprises the steps of preparing the core material; preparing the precursor [NixCoyMnz (OH)2] of the shell material; cladding; and carrying out sintering twice or many times. According to high-voltage cathode material disclosed by the invention, advantages of Ni and Co elements can be given a full play, the high-voltage cathode material has the advantages of high operation voltage and high energy density as well as excellent high-temperature cycle performance and the dissolution amount of Co can be controlled well.
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Description

technical field

[0001] The invention relates to an inorganic functional material and a high-tech battery technology, in particular to a positive electrode active material for a lithium ion secondary battery and a preparation method thereof. Background technique

[0002] Due to its high energy density, high working voltage and rechargeability, lithium-ion secondary batteries have developed very fast since their inception, and their application fields have also gradually expanded, from the initial power supply of portable devices to defense , automotive and aviation fields. The capacity and performance of the lithium-ion battery are mainly affected by the cathode material, and the cathode material accounts for about 30% of the cost of the lithium-ion battery. Therefore, the development of high-performance cathode materials is the key to improving the technology of lithium-ion batteries.

[0003] Among the cathode materials for lithium-ion batteries, nickel-cobalt-lithium mang...

Claims

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