发明名称 |
GRAPHITE PARTICLES AND LITHIUM SECONDARY CELL USING THEM AS NEGATIVE ELECTRODE |
摘要 |
A graphite particle obtained by assembling or binding together a plurality of flat-shaped particles so that the planes of orientation are not parallel to one another, or a graphite particle in which aspect ratio is 5 or less or specific surface area is 8 m2/g or less or the size of crystallite in the direction of c-axis of the crystal is 500 .ANG. or more and the size of crystallite in the direction of plane is 1,000 .ANG. or less as measured by X ray broad angle diffraction, or a graphite particle in which pore volume of the pores having a size falling in a range of 10 2 to 10 6 .ANG. is 0.4 to 2.0 cc/g per weight of graphite particle or pore volume of the pores having a size falling in a range of 1 × 10 2 to 2 × 10 4 .ANG. is 0.08 to 0.4 cc/g per weight of graphite particle is suitable for production of negative electrode of lithium secondary battery, and a lithium secondary battery obtained therefrom is excellent in rapid charge-discharge characteristics, cycle characteristics, etc. |
申请公布号 |
CA2558717(A1) |
申请公布日期 |
1998.02.19 |
申请号 |
CA19972558717 |
申请日期 |
1997.08.07 |
申请人 |
HITACHI CHEMICAL COMPANY, LTD. |
发明人 |
ISHII, YOSHITO;FUJITA, ATSUSHI;YAMADA, KAZUO;NISHIDA, TATSUYA |
分类号 |
C01B31/04;H01M4/02;H01M4/04;H01M4/36;H01M4/62 |
主分类号 |
C01B31/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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