Invention Grant
- Patent Title: Nonaqueous electrolyte secondary battery and its anode
- Patent Title (中): 非水电解质二次电池及其阳极
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Application No.: US09154796Application Date: 1998-09-17
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Publication No.: US06420070B1Publication Date: 2002-07-16
- Inventor: Shinji Kasamatsu , Yoshiaki Nitta , Hiroki Muraoka , Shoichiro Watanabe
- Applicant: Shinji Kasamatsu , Yoshiaki Nitta , Hiroki Muraoka , Shoichiro Watanabe
- Priority: JP9-254534 19970919
- Main IPC: H01M448
- IPC: H01M448

Abstract:
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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