发明申请
- 专利标题： NEGATIVE ELECTRODE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, MAKING METHOD AND LITHIUM ION SECONDARY BATTERY
- 专利标题（中）： 非电解二次电池负极电极材料，制造方法和锂离子二次电池
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申请号： US12781579申请日： 2010-05-17
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公开(公告)号： US20100288970A1公开(公告)日： 2010-11-18
- 发明人: Koichiro WATANABE , Meguru Kashida , Hirofumi Fukuoka
- 申请人： Koichiro WATANABE , Meguru Kashida , Hirofumi Fukuoka
- 优先权： JP2009-120058 20090518
- 主分类号： H01M4/02
- IPC分类号： H01M4/02 ; H01M4/04
摘要：
A negative electrode material for nonaqueous electrolyte secondary batteries comprises composite particles which are prepared by coating surfaces of particles having silicon nano-particles dispersed in silicon oxide with a carbon coating, and etching the coated particles in an acidic atmosphere. The silicon nano-particles have a size of 1-100 nm. The composite particles contain oxygen and silicon in a molar ratio: O
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