- 专利标题: Negative electrode active material for lithium ion rechargeable battery and negative electrode using the same
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申请号: US16288948申请日: 2019-02-28
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公开(公告)号: US11276858B2公开(公告)日: 2022-03-15
- 发明人: Takanobu Kawai , Ken-ichi Hongawa , Hayato Matsumoto , Kazuaki Yamashita
- 申请人: NIPPON CARBON CO., LTD.
- 申请人地址: JP Tokyo
- 专利权人: NIPPON CARBON CO., LTD.
- 当前专利权人: NIPPON CARBON CO., LTD.
- 当前专利权人地址: JP Tokyo
- 代理机构: Flynn Thiel, P.C.
- 优先权: JP2006-197043 20060719,JP2007-166226 20070625
- 主分类号: H01M4/58
- IPC分类号: H01M4/58 ; H01M4/13 ; H01M4/587 ; H01M4/583 ; H01M4/133 ; H01M10/0525 ; H01M4/36 ; H01M4/02
摘要:
A negative electrode active material for a lithium ion secondary battery, made up of substantially spherical graphite particles (A), having fine protrusions on the surfaces thereof and obtained by impregnating and coating substantially spherical graphite particles with a mixture of pitch and carbon black, followed by baking in a range of 900 to 1500° C. In accordance with Raman spectroscopic analysis of the particles (A) using argon laser Raman scattering light, there exists a G-band composite peak comprising peaks in the vicinity of 1600 cm−1, and 1580 cm−1, respectively, and at least one peak in the vicinity of D-band at 1380 cm−1, an interlayer distance of the lattice plane d002, obtained by wide-range X-ray diffraction, being in the range of 0.335 to 0.337 nm.
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