发明申请
- 专利标题： Non-Aqueous Electrolyte Secondary Battery
- 专利标题（中）： 非水电解液二次电池
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申请号： US11667110申请日： 2005-11-16
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公开(公告)号： US20080118833A1公开(公告)日： 2008-05-22
- 发明人: Atsushi Ueda , Shoichiro Watanabe , Takeshi Yao , Takashi Takeuchi , Takayuki Shirane , Takaya Saito , Hiromi Nagata
- 申请人： Atsushi Ueda , Shoichiro Watanabe , Takeshi Yao , Takashi Takeuchi , Takayuki Shirane , Takaya Saito , Hiromi Nagata
- 优先权： JP2004-335661 20041119
- 国际申请： PCT/JP05/21046 WO 20051116
- 主分类号： H01M4/02
- IPC分类号： H01M4/02 ; H01M4/58 ; H01M4/52 ; H01M10/40
摘要：
A non-aqueous electrolyte secondary battery includes a positive electrode that contains a lithium composite oxide as an active material. The cut-off voltage of charge is set to 4.25 to 4.5 V. In a region where the positive electrode and the negative electrode face each other, the Wp/Wn ratio R is in the range from 1.3 to 19 where Wp is the weight of the active material contained in the positive electrode per unit area and Wn is the weight of the active material contained in the negative electrode per unit area. This battery is excellent in safety, cycle characteristics, and storage characteristics even when the cut-off voltage of charge in a normal operating condition is set to 4.25 V or more.
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