Silicon monoxide composite cathode material for lithium ion battery, and preparation method thereof

A lithium-ion battery, silicon oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limited preparation methods, waste of resources, and high cost of nano-silicon powder
CN102306759AActive Publication Date: 2012-01-04CHERY AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHERY AUTOMOBILE CO LTD
Publication Date
2012-01-04

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Abstract

The invention discloses a silicon monoxide composite cathode material for a lithium ion battery, and a preparation method thereof. The method comprises steps that: (1) silicon monoxide is sintered under a high temperature in an inert atmosphere, such that nano-sized silicon particles and amorphous silicon dioxide are produced; (2) a certain amount of sintered silicon monoxide and a certain amount of a conductive agent are accurately weighed, the materials are added into a planetary ball mill, and composite ball-milling is carried out upon the materials, such that the silicon monoxide composite cathode material is obtained, wherein silicon monoxide takes 30% to 90% of a total mass of the silicon monoxide composite cathode material. The silicon monoxide composite cathode material provided by the invention has advantages of high capacity, good cycling performance, and good conductivity. The preparation method has advantages of low raw material cost, simple preparation technology, and suitability for industrialized productions.
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Description

technical field

[0001] The invention belongs to the field of lithium ion batteries, and in particular relates to a preparation method of a lithium ion battery composite negative electrode material, in particular to a lithium ion battery high-capacity, good cycle stability silicon oxide composite negative electrode material and a preparation method thereof. Background technique

[0002] From the micro-battery required by small electronic devices to the power source of large electric vehicles, lithium-ion batteries are being used more and more widely, and have become a new type of chemical power source with great development potential in the 21st century. At present, most commercial lithium-ion batteries use the lithium cobaltate / graphite system. Due to the low theoretical lithium storage capacity limit of the electrode itself (such as the theoretical specific capacity of graphite is 372mAh / g), it is already possible to improve battery performance by improving the battery prepa...

Claims

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