- 专利标题: Negative electrode material and lithium secondary battery using same
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申请号: US16182865申请日: 2018-11-07
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公开(公告)号: US10811678B2公开(公告)日: 2020-10-20
- 发明人: Shinsuke Matsuhara , Kazuhisa Takeda
- 申请人: TOYOTA JIDOSHA KABUSHIKI KAISHA
- 申请人地址: JP Toyota-shi, Aichi-ken
- 专利权人: TOYOTA JIDOSHA KABUSHIKI KAISHA
- 当前专利权人: TOYOTA JIDOSHA KABUSHIKI KAISHA
- 当前专利权人地址: JP Toyota-shi, Aichi-ken
- 代理机构: Sughrue Mion, PLLC
- 优先权: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@3b4b34f5
- 主分类号: H01M4/36
- IPC分类号: H01M4/36 ; H01M4/62 ; H01M4/587 ; H01M4/133 ; H01M10/0525 ; H01M4/02
摘要:
According to the present invention, there is provided a negative electrode material for a lithium secondary battery, including a negative electrode active material including a carbon material and having an ID/IG ratio of XPS of 0.2 to 0.74, and a coating portion disposed on a surface of the negative electrode active material. The coating portion has a boron atom and a crosslinking site having a bonding portion of C—O—C and interposed between the boron atom and the negative electrode active material. In an XPS spectrum, when an area of the peak of the 1s electron orbital of the boron atom is denoted by Ab and an area of the peak of the C—O—C bonding portion is denoted by Ac, the ratio Ac/Ab of the peak area Ac to the peak area Ab is 0.11 or more and 0.51 or less.
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