Prepn process of polynary positive pole material of lithium ion cell with compound transition metal oxide as intermediate product

A composite oxide, lithium-ion battery technology, used in oxide/hydroxide preparation, battery electrodes, electrical components, etc., to achieve excellent electrochemical performance, large size, and improve energy density.
CN1847155AActive Publication Date: 2006-10-18SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Publication Date
2006-10-18

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Abstract

The present invention relates to the preparation process of polynary positive pole material of lithium ion cell. The polynary positive pole material is prepared through first preparation of compound transition metal oxide in spinel structure as the intermediate product, the subsequent mixing with lithium salt and final high temperature calcining. The polynary positive pole material has composition of LiNixCoyMn(1-x-y)O2, where, x is 0.1-0.8, y is 0.1-0.5, and x+y is 0.5-1.0. The polynary positive pole material has homogeneous granularity distribution, specific discharge capacity in 2.8-4.3 V / Li up to 157 mAh / g, excellent circulating stability and low cost, and is suitable for use in lithium ion cell.
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Description

technical field

[0001] The present invention relates to a preparation method of a multi-element positive electrode material for a lithium ion battery, more precisely, it relates to the preparation of a multi-element positive electrode material for a lithium ion battery with excellent performance by using a transition metal composite oxide as an intermediate product by a solid phase calcination method method. The invention belongs to the field of lithium ion battery electrode materials. technical background

[0002] With the continued popularity of mobile electronic consumer products such as mobile phones, digital cameras, notebook computers, PDAs and camcorders, and the huge application potential of lithium-ion power batteries, the market demand for lithium-ion batteries will still maintain a considerable growth rate in the future. The global annual demand for lithium cobalt oxide, a traditional cathode material, has exceeded 10,000 tons, which has led to a sharp rise in th...

Claims

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