发明授权
US08530110B2 Lithium-ion secondary battery separator and lithium-ion secondary battery
有权
锂离子二次电池分离器和锂离子二次电池
- 专利标题： Lithium-ion secondary battery separator and lithium-ion secondary battery
- 专利标题（中）： 锂离子二次电池分离器和锂离子二次电池
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申请号： US12618979申请日： 2009-11-16
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公开(公告)号： US08530110B2公开(公告)日： 2013-09-10
- 发明人: Katsuo Naoi , Kenji Nishizawa , Mitsuo Kougo , Yoshihiko Ohashi , Hidetake Itoh
- 申请人： Katsuo Naoi , Kenji Nishizawa , Mitsuo Kougo , Yoshihiko Ohashi , Hidetake Itoh
- 申请人地址： JP Tokyo
- 专利权人： TDK Corporation
- 当前专利权人： TDK Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oliff & Berridge, PLC
- 优先权： JPP2008-295608 20081119
- 主分类号： H01M8/10
- IPC分类号： H01M8/10
摘要：
A lithium-ion secondary battery separator has a porous structure formed by laminating a second polymer layer, a first polymer layer, and a second polymer layer in sequence. The second polymer layer has a melting point lower than that of the first polymer layer. The second polymer layer has a higher molecular part formed on a side in contact with the first polymer layer and a lower molecular part formed on a side farther from the first polymer layer than is the higher molecular part. The higher and lower molecular parts have a weight-average molecular weight ratio (higher molecular part/lower molecular part) of 4 to 19 therebetween.
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