H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 4/133 (2010.01) H01M 4/1393 (2010.01) H01M 4/587 (2010.01)
Patent
CA 2694838
The present invention relates to graphite powder and to a battery using it as a negative electrode material, the powder having a specific surface area of not more than 3 m2/g, an aspect ratio of not more than 6, and a tapping bulk density of not less than 0.8 g/cm3; or a tapping bulk density of not less than 0.8 g/cm3 and an oxidation initiation temperature of not less than 600°C; or a specific surface area of not more than 3 m2/g and a tapping bulk density of not less than 0.8 g/cm3, a specific electrical resistance of the powder not more than 0.06 .OMEGA.cm in the specified condition. The battery obtained thus has a large discharge capacity, good cycle property and high charge and discharge efficiency.
Nishimura Kunio
Sotowa Chiaki
Sudoh Akinori
Goudreau Gage Dubuc
Showa Denko K.k.
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