发明申请
- 专利标题: NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
- 专利标题(中): 非电解电解质二次电池和非电解电解质二次电池负极
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申请号: US14779824申请日: 2014-03-18
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公开(公告)号: US20160049651A1公开(公告)日: 2016-02-18
- 发明人: Shouichiro Sawa , Ayano Toyoda , Taizou Sunano
- 申请人: SANYO ELECTRIC CO., LTD.
- 申请人地址: JP Daito-shi, Osaka
- 专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人: SANYO ELECTRIC CO., LTD.
- 当前专利权人地址: JP Daito-shi, Osaka
- 优先权: JP2013-065100 20130326
- 国际申请: PCT/JP2014/001535 WO 20140318
- 主分类号: H01M4/38
- IPC分类号: H01M4/38 ; H01M10/052
摘要:
A nonaqueous electrolyte secondary battery which has a good capacity retention ratio (cycle characteristics) and in which the expansion and shrinkage during charging and discharging are small compared with the case where a negative electrode made of only a negative electrode active material that forms an alloy with lithium is used. A negative electrode for a nonaqueous electrolyte secondary battery according to one aspect of the present invention includes a negative electrode mixture layer formed on a current collector and containing a binder and a negative electrode active material particle that forms an alloy with lithium. The negative electrode mixture layer includes pillar portions, and a value of S1/S2 is 0.46 or more and 0.58 or less, where S1 represents a total area of the pillar portions in plan view and S2 represents a total area of one surface of the negative electrode current collector in plan view.
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