发明授权
US07919205B2 Negative electrode for lithium ion secondary battery, production method thereof and lithium ion secondary battery comprising the same
有权
锂离子二次电池用负极及其制造方法以及包含该锂离子二次电池的锂离子二次电池
- 专利标题： Negative electrode for lithium ion secondary battery, production method thereof and lithium ion secondary battery comprising the same
- 专利标题（中）： 锂离子二次电池用负极及其制造方法以及包含该锂离子二次电池的锂离子二次电池
-
申请号： US11266299申请日： 2005-11-04
-
公开(公告)号： US07919205B2公开(公告)日： 2011-04-05
- 发明人: Yasutaka Kogetsu , Kazuyoshi Honda , Toshitada Sato , Hiroshi Yoshizawa
- 申请人： Yasutaka Kogetsu , Kazuyoshi Honda , Toshitada Sato , Hiroshi Yoshizawa
- 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： JP2004-328064 20041111
- 主分类号： H01M4/00
- IPC分类号： H01M4/00
摘要：
A negative electrode for a lithium ion secondary battery of the present invention includes a current collector and an active material layer carried on the current collector. The active material layer contains silicon and oxygen. In the thickness direction of the active material layer, an oxygen ratio of the active material is greater at the side of the active material layer in contact with the current collector than at the side of the active material layer not in contact with the current collector. The active material layer contains no binder. By using the negative electrode described above, it is possible to provide a high capacity lithium ion secondary battery having superior high rate charge/discharge characteristics and excellent cycle characteristics.