发明授权
US07901813B2 Non-aqueous electrolyte additive for improving safety and lithium ion secondary battery comprising the same
有权
用于改进安全性的非水电解质添加剂和包含该非水电解质添加剂的锂离子二次电池
- 专利标题: Non-aqueous electrolyte additive for improving safety and lithium ion secondary battery comprising the same
- 专利标题(中): 用于改进安全性的非水电解质添加剂和包含该非水电解质添加剂的锂离子二次电池
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申请号: US11651463申请日: 2007-01-10
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公开(公告)号: US07901813B2公开(公告)日: 2011-03-08
- 发明人: Hong-Kyu Park , Jeh-Won Choi , Yeon-Hee Lee , Young-Tack An , Hyeong-Jin Kim
- 申请人: Hong-Kyu Park , Jeh-Won Choi , Yeon-Hee Lee , Young-Tack An , Hyeong-Jin Kim
- 申请人地址: KR Seoul
- 专利权人: LG Chem, Ltd.
- 当前专利权人: LG Chem, Ltd.
- 当前专利权人地址: KR Seoul
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: KR2001-0028063 20010522
- 主分类号: H01M6/16
- IPC分类号: H01M6/16 ; C07C33/34 ; C07C35/00
摘要:
The present invention relates to a non-aqueous electrolyte additive for improving safety and a lithium secondary battery comprising the same, and more particularly to a non-aqueous electrolyte additive that can improve cycle life and safety properties of a lithium ion secondary battery. According to the present invention, an organometallic compound represented by the Chemical Formula 1 is added to a non-aqueous electrolyte of a battery as an additive, and thus if a battery voltage is out of normal operation voltage range due to a short circuit and overcharge of a battery, etc., the non-aqueous electrolyte additive decomposes and a part of the decomposed additive polymerizes to form an insulating film on a cathode surface, and a part of the metal reacts with an insulating film formed on a cathode surface to improve thermal stability of the battery, thereby improving safety of the battery.