发明授权
- 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: US12055704申请日: 2008-03-26
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公开(公告)号: US07691538B2公开(公告)日: 2010-04-06
- 发明人: Kentaro Takahashi
- 申请人: Kentaro Takahashi
- 申请人地址: JP Moriguchi-shi
- 专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人地址: JP Moriguchi-shi
- 代理机构: Westerman, Hattori, Daniels & Adrian, LLP
- 优先权: JP2007-083490 20070328
- 主分类号: H01M6/16
- IPC分类号: H01M6/16 ; H01M6/04
摘要:
In a nonaqueous electrolyte secondary battery according to an embodiment of the invention, a nonaqueous electrolyte contains: a tertiary carboxylate ester represented by the following general formula (1) in an amount of a range of 3% by mass or more and 80% by mass or less based on the total mass of the nonaqueous solvent: where R1, R2, R3, R4 represent a (C1 to 4) alkyl group, respectively, and one or more acid anhydride selected from succinic anhydride, glutaric anhydride, and glycolic anhydride in an amount of a range of 0.1% by mass or more and 5% by mass or less based on the total mass of the nonaqueous electrolyte. By containing such a constitution, in other words, by containing a nonaqueous solvent capable of stabilizing the coating film of the negative electrode, a nonaqueous electrolyte secondary battery in which not only can satisfactory cycle performance and retention characteristics be obtained, but also the overcharging performance is largely improved, can be provided.
公开/授权文献
- US20080241702A1 NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 公开/授权日:2008-10-02