Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Reexamination Certificate
2006-11-28
2006-11-28
Hendrickson, Stuart L. (Department: 1754)
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
C429S231800, C429S231950, C429S231400
Reexamination Certificate
active
07141229
ABSTRACT:
This invention relates to a graphite material for negative electrode of lithium secondary battery. This graphite material is obtained by carbonizing the pulverized green coke to yield coke, adding one kind or more of boron or a compound thereof to the coke, graphitizing the resulting mixture and controlling the particle size of the product graphite. This graphite material for negative electrode is characterized by showing a tap density of 0.95 g/cm3or more after tapping 20 times or 1.15 g/cm3or more after tapping 300 times and a BET specific surface area of 1.5 m2/g or less. A lithium secondary battery made by the use of this graphite material for negative electrode has a large discharge capacity and suffers little loss during charging and discharging.
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International Search Report for PCT/JP02/01861 mailed on Jun. 11, 2002.
English Translation of International Preliminary Examination Report for PCT/JP02/01861 mailed on Oct. 10, 2003.
Fukuda Tetsusei
Hamada Takeshi
Kawano Yoichi
Kohno Taro
Shoji Hiromasa
Hendrickson Stuart L.
Nippon Steel Chemical Co. Ltd.
Rader & Fishman & Grauer, PLLC
Raetzsch Alvin T
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