Graphite particles and lithium secondary battery using the same as negative electrode
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United States of America Patent
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Jul 15, 2008
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N/A
app pub date -
Jan 22, 2007
filing date -
Aug 8, 1996
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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 m.sup.2/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.sup.2 to 10.sup.6 .ANG. is 0.4 to 2.0 cc/q per weight of graphite particle or pore volume of the pores having a size falling in a range of 1.times.10.sup.2 to 2.times.10.sup.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.
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