发明申请
- 专利标题： Nonaqueous electrolyte secondary battery
- 专利标题（中）： 非水电解质二次电池
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申请号： US12078052申请日： 2008-03-26
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公开(公告)号： US20080241703A1公开(公告)日： 2008-10-02
- 发明人: Hidekazu Yamamoto , Yasuo Takano , Takanobu Chiga , Atsushi Fukui , Taizou Sunano , Maruo Kamino
- 申请人： Hidekazu Yamamoto , Yasuo Takano , Takanobu Chiga , Atsushi Fukui , Taizou Sunano , Maruo Kamino
- 优先权： JP2007-084494 20070328; JP2007-246571 20070925
- 主分类号： H01M10/26
- IPC分类号： H01M10/26 ; H01M4/58
摘要：
A nonaqueous electrolyte secondary battery which includes a positive electrode, a negative electrode and a separator stacked and wound in a cylindrical configuration, and which achieves a high energy density and superior cycle performance characteristics.The nonaqueous electrolyte secondary battery includes a positive electrode containing a positive active material, a negative electrode containing a negative active material, a separator interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte containing a solvent and a solute. Those positive electrode, negative electrode and separator are stacked and wound in a cylindrical configuration. Characteristically, the negative active material comprises a material that stores lithium via alloying with lithium, the solvent in the nonaqueous electrolyte contains a fluorinated cyclic carbonate, and the nonaqueous electrolyte has a viscosity of not higher than 2.5 mPas.