发明授权
- 专利标题: Positive electrode for non-aqueous electrolyte secondary batteries and non-aqueous electrolyte secondary battery
- 专利标题(中): 非水电解质二次电池用正极和非水电解质二次电池
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申请号: US13383791申请日: 2011-03-18
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公开(公告)号: US09112209B2公开(公告)日: 2015-08-18
- 发明人: Kazuki Endo , Masato Fujikawa
- 申请人: Kazuki Endo , Masato Fujikawa
- 申请人地址: JP Osaka
- 专利权人: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- 当前专利权人: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- 当前专利权人地址: JP Osaka
- 代理机构: McDermott Will & Emery LLP
- 优先权: JP2010-123016 20100528
- 国际申请: PCT/JP2011/001638 WO 20110318
- 国际公布: WO2011/148550 WO 20111201
- 主分类号: H01M4/131
- IPC分类号: H01M4/131 ; H01M4/62 ; H01M10/0525 ; H01M10/0587
摘要:
Disclosed is a positive electrode for non-aqueous electrolyte secondary batteries, the positive electrode including a positive electrode material mixture layer which includes positive electrode active material particles and a binder. A curve representing a correlation between a distance from a current collector in the thickness direction of the positive electrode material mixture layer and an amount of the binder has a first maximum point, a minimum point, and a second maximum point. The minimum point corresponds to a position in a center area of the positive electrode material mixture layer in a thickness direction thereof, and the first and second maximum points correspond to a position nearer the current collector and a position further away from the current collector than the position corresponding to the minimum point, respectively. A ratio W1/W2 of an amount W1 at the first maximum point to an amount W2 at the minimum point of the binder per 100 parts by weight of the positive electrode active material particles is greater than 2.
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