发明名称 |
Graphite particles and lithium secondary battery using the same 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 m<SUP>2</SUP>/g or less or the size of crystallite in the direction of c-axis of the crystal is 500 Å or more and the size of crystallite in the direction of plane is 1,000 Å 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<SUP>2 </SUP>to 10<SUP>6 </SUP>Å 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 1x10<SUP>2 </SUP>to 2x10<SUP>4 </SUP>Å is 0.08 to 0.4 cc/a 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.
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申请公布号 |
US7378191(B2) |
申请公布日期 |
2008.05.27 |
申请号 |
US20050311253 |
申请日期 |
2005.12.20 |
申请人 |
HITACHI CHEMICAL COMPANY, LTD. |
发明人 |
ISHII YOSHITO;NISHIDA TATSUYA;FUJITA ATSUSHI;YAMADA KAZUO |
分类号 |
H01M4/36;C01B31/04;H01M4/02;H01M4/04;H01M4/133;H01M4/1393;H01M4/58;H01M4/583;H01M4/587;H01M10/052;H01M10/0525;H01M10/058;H01M10/36 |
主分类号 |
H01M4/36 |
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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