发明授权
- 专利标题: Negative electrode for lithium secondary cell and lithium secondary cell using the same
- 专利标题(中): 锂二次电池用负极及使用其的锂二次电池
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申请号: US12597697申请日: 2008-04-11
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公开(公告)号: US08273479B2公开(公告)日: 2012-09-25
- 发明人: Masaki Hasegawa , Masaya Ugaji , Keisuke Ohara , Hitoshi Matsumoto
- 申请人: Masaki Hasegawa , Masaya Ugaji , Keisuke Ohara , Hitoshi Matsumoto
- 申请人地址: JP Osaka
- 专利权人: Panasonic Corporation
- 当前专利权人: Panasonic Corporation
- 当前专利权人地址: JP Osaka
- 代理机构: McDermott Will & Emery LLP
- 优先权: JP2007-119352 20070427
- 国际申请: PCT/JP2008/000960 WO 20080411
- 国际公布: WO2008/139682 WO 20081120
- 主分类号: H01M4/13
- IPC分类号: H01M4/13 ; H01M4/58 ; H01M4/02
摘要:
A negative electrode for a lithium secondary battery according to the present invention includes a current collector 12, and an active material layer 14 formed on the current collector 12. The active material layer 14 includes a plurality of negative-electrode active material members 16 disposed on the current collector 12. Each negative-electrode active material member 16 is oxide, including a first region 18 of a relatively high oxygen concentration and a plurality of second regions 20 having an oxygen concentration which is lower than that of the first region 18. The first region 18 extends from a bottom face of each negative-electrode active material member 16 in a direction away from the surface of the current collector. The plurality of second regions 20 are alternately disposed on both sides of the first region 18.
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