- 专利标题: Negative electrode material for secondary battery, and secondary battery
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申请号: US14389514申请日: 2013-03-06
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公开(公告)号: US09748556B2公开(公告)日: 2017-08-29
- 发明人: Akio Toda , Kimiyoshi Fukatsu , Ryota Yuge , Shinji Fujieda
- 申请人: Akio Toda , Kimiyoshi Fukatsu , Ryota Yuge , Shinji Fujieda
- 申请人地址: JP Tokyo
- 专利权人: NEC Corporation
- 当前专利权人: NEC Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Wilmer Cutler Pickering Hale and Dorr LLP
- 优先权: JP2012-082756 20120330
- 国际申请: PCT/JP2013/056130 WO 20130306
- 国际公布: WO2013/146144 WO 20131003
- 主分类号: H01M4/133
- IPC分类号: H01M4/133 ; C01B31/04 ; H01M4/36 ; H01M4/587 ; H01M10/0525 ; H01M4/02
摘要:
The present invention relates to a negative electrode material for secondary batteries, comprising graphite; wherein the graphite comprises hexagonal crystal graphite and rhombohedral crystal graphite, and has a low-crystalline carbon coating on a surface thereof; and the graphite has exothermic peaks in the range of 600° C. or lower and in the range of 690° C. or higher in DTA measurement, or the graphite has a full width at half maximum of a (101) peak of the hexagonal crystal graphite of 0.2575° or less in XRD measurement, or the graphite has an absolute value of the difference between the lattice strain obtained from (101) plane spacing of the hexagonal crystal graphite and the lattice strain obtained from (100) plane spacing of the hexagonal crystal graphite of 7.1×10−4 or less in XRD measurement.
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