Invention Grant
- Patent Title: Graphite particles and lithium secondary battery using the same as negative electrode
- Patent Title (中): 石墨颗粒和锂二次电池使用与负极相同
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Application No.: US13085618Application Date: 2011-04-13
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Publication No.: US08129051B2Publication Date: 2012-03-06
- Inventor: Yoshito Ishii , Tatsuya Nishida , Atsushi Fujita , Kazuo Yamada
- Applicant: Yoshito Ishii , Tatsuya Nishida , Atsushi Fujita , Kazuo Yamada
- Applicant Address: JP Tokyo
- Assignee: Hitachi Chemical Company, Ltd.
- Current Assignee: Hitachi Chemical Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP08-209713 19960808; JP08-264265 19961004; JP08-288109 19961030; JP08-323921 19961204; JP08-348405 19961226; JP08-348406 19961226
- Main IPC: H01M4/48
- IPC: H01M4/48

Abstract:
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/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.
Public/Granted literature
- US20110189542A1 Graphite Particles And Lithium Secondary Battery Using The Same As Negative Electrode Public/Granted day:2011-08-04
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