发明授权
- 专利标题: Nonaqueous electrolyte secondary battery and its anode
- 专利标题(中): 非水电解质二次电池及其阳极
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申请号: US09154796申请日: 1998-09-17
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公开(公告)号: US06420070B1公开(公告)日: 2002-07-16
- 发明人: Shinji Kasamatsu , Yoshiaki Nitta , Hiroki Muraoka , Shoichiro Watanabe
- 申请人: Shinji Kasamatsu , Yoshiaki Nitta , Hiroki Muraoka , Shoichiro Watanabe
- 优先权: JP9-254534 19970919
- 主分类号: H01M448
- IPC分类号: H01M448
摘要:
Using a graphite material capable of intercalating and de-intercalating lithium ions as the anode, the peak intensity ratio R(=I(110)/I(004)) corresponding to lattice planes (110) and (004) of graphite material obtained by wide angle X-ray diffraction measurement of this anode is in a range of 0.05 to 0.5. Hence, edges of graphite crystals exist adequately on the electrode surface at the interface to the electrolyte, and therefore intercalation of lithium proceeds smoothly, polarization at the time of charging and discharging is suppressed, and a nonaqueous electrolyte secondary battery excellent in high rate discharging characteristic is obtained. The obtained battery is small in deterioration if charging and discharging are repeated.
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