发明授权
- 专利标题: Carbon particles for negative electrode of lithium ion secondary battery, negative electrode for lithium ion secondary battery, and lithium ion secondary battery
- 专利标题(中): 锂离子二次电池用负极用碳粒子,锂离子二次电池用负极和锂离子二次电池
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申请号: US13503879申请日: 2010-10-20
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公开(公告)号: US09450246B2公开(公告)日: 2016-09-20
- 发明人: Teppei Takahashi , Yoshito Ishii , Keiji Okabe , Yuriko Ida , Nobushige Nakamura
- 申请人: Teppei Takahashi , Yoshito Ishii , Keiji Okabe , Yuriko Ida , Nobushige Nakamura
- 申请人地址: JP Tokyo
- 专利权人: HITACHI CHEMICAL COMPANY, LTD.
- 当前专利权人: HITACHI CHEMICAL COMPANY, LTD.
- 当前专利权人地址: JP Tokyo
- 代理机构: Fitch, Even, Tabin & Flannery, LLP
- 优先权: JPP2009-246798 20091027
- 国际申请: PCT/JP2010/068488 WO 20101020
- 国际公布: WO2011/052452 WO 20110505
- 主分类号: H01M4/583
- IPC分类号: H01M4/583 ; H01M4/587 ; C01B31/04 ; H01M10/0525
摘要:
Disclosed are carbon particles for a negative electrode of a lithium ion secondary battery, the carbon particles having a pore volume of pores having a size of 2×10 to 2×104 Å, of 0.1 ml/g or less with respect to the mass of the carbon particles; having an interlayer distance d(002) of a graphite crystal as determined by an X-ray diffraction analysis, of 3.38 Å or less; having a crystallite size Lc in the C-axis direction of 500 Å or more; and having a degree of circularity of the particle cross-section in the range of 0.6 to 0.9. Therefore, the carbon particles for the negative electrode of the lithium ion secondary battery enables to have high capacity and have superior rapid charge characteristics, a negative electrode for a lithium ion secondary battery using the carbon particles, and a lithium ion secondary battery can be provided.
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