发明申请
- 专利标题： NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY
- 专利标题（中）： 非电解电解质二次电池
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申请号： US13368950申请日： 2012-02-08
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公开(公告)号： US20120141886A1公开(公告)日： 2012-06-07
- 发明人: Satoshi NAKASHIMA , Yasushi USAMI , Akihiko SAKAI , Manabu HAYASHI , Ryoichi KATO
- 申请人： Satoshi NAKASHIMA , Yasushi USAMI , Akihiko SAKAI , Manabu HAYASHI , Ryoichi KATO
- 申请人地址： JP Tokyo JP Tokyo
- 专利权人： Mitsubishi Plastics, Inc.,MITSUBISHI CHEMICAL CORPORATION
- 当前专利权人： Mitsubishi Plastics, Inc.,MITSUBISHI CHEMICAL CORPORATION
- 当前专利权人地址： JP Tokyo JP Tokyo
- 优先权： JP2003-416761 20031215; JP2003-416762 20031215; JP2004-033617 20040210; JP2004-033618 20040210; JP2004-033619 20040210
- 主分类号： H01M10/056
- IPC分类号： H01M10/056 ; H01M4/485 ; H01M4/583
摘要：
A subject for the invention is to improve the cycle characteristics of a high-capacity secondary battery containing an active material packet at a high density, by using a particulate active material having a low aspect ratio.The invention relates to a nonaqueous-electrolyte secondary battery comprising a negative electrode and a positive electrode each capable of occluding/releasing lithium, a separator, and a nonaqueous electrolyte solution comprising a nonaqueous solvent and a lithium salt, characterized in that the separator comprises a porous film made of a thermoplastic resin containing an inorganic filler, and at least either of the following is satisfied: the active material contained in the negative electrode is a particulate active material having an aspect ratio of from 1.02 to 3; and the active material contained in the positive electrode is a particulate active material having an aspect ratio of from 1.02 to 2.2.
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