发明授权
- 专利标题: Negative electrode material for lithium battery, and lithium battery
- 专利标题(中): 锂电池负极材料和锂电池
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申请号: US13089588申请日: 2011-04-19
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公开(公告)号: US08388922B2公开(公告)日: 2013-03-05
- 发明人: Chiaki Sotowa , Masataka Takeuchi , Hidekazu Mori , Masahiro Yamakawa
- 申请人: Chiaki Sotowa , Masataka Takeuchi , Hidekazu Mori , Masahiro Yamakawa
- 申请人地址: JP Tokyo JP Tokyo
- 专利权人: Showa Denko K.K.,Zeon Corporation
- 当前专利权人: Showa Denko K.K.,Zeon Corporation
- 当前专利权人地址: JP Tokyo JP Tokyo
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2004-000254 20040105
- 主分类号: H01M4/04
- IPC分类号: H01M4/04 ; H01M4/583 ; H01M4/62
摘要:
The present invention relates to a negative electrode material for a lithium battery comprising a carbonaceous negative electrode active substance having a specific surface area of 1 m2/g or more, a binder formed of styrene-butadiene rubber and a carbon fiber having a fiber diameter of 1 to 1,000 nm; and to a lithium battery using the negative electrode material, which has excellent characteristics, i.e., low electrode resistance, high electrode strength, excellent electrolytic solution permeability, high energy density, and good high-speed charging/discharging performance. The negative electrode material contains carbon fiber in the amount of 0.05 to 20 mass % and the binder formed of styrene-butadiene rubber in 0.1 to 6.0 mass %, and may further contain a thickener such as carboxymethyl cellulose in the amount of 0.3 to 3 mass %.
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