发明授权
- 专利标题: Graphite particles and lithium secondary battery using the same as negative electrode
- 专利标题(中): 石墨颗粒和锂二次电池使用与负极相同
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申请号: US11311253申请日: 2005-12-20
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公开(公告)号: US07378191B2公开(公告)日: 2008-05-27
- 发明人: Yoshito Ishii , Tatsuya Nishida , Atsushi Fujita , Kazuo Yamada
- 申请人: Yoshito Ishii , Tatsuya Nishida , Atsushi Fujita , Kazuo Yamada
- 申请人地址: JP Tokyo
- 专利权人: Hitachi Chemical Company, Ltd.
- 当前专利权人: Hitachi Chemical Company, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Antonelli, Terry, Stout & Kraus, LLP.
- 优先权: JP8-209713 19960808; JP8-264265 19961004; JP8-288109 19961030; JP8-323921 19961204; JP8-348405 19961226; JP8-348406 19961226
- 主分类号: H01M4/48
- IPC分类号: H01M4/48
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 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 102 to 106 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 1×102 to 2×104 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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