Patent ID: 8133612

Claim:
A negative electrode of a rechargeable battery, comprising: a graphite A comprising of a plurality of graphite granules, said graphite granules having an average granule diameter between 10 and 40 μm, and a crystallite interlayer spacing for said granules, d 002 , of between 0.335 nm and 0.342 nm; and a graphite B comprising of a plurality of graphite granules with an average granule diameter between 5 μm and 30 μm and a crystallite interlayer spacing, d 002 , between 0.336 nm and 0.360 nm, wherein the weight ratio of said graphite A to said graphite B is between 25:75 and 80:20, wherein the graphite granules of said graphite B are disposed between gaps of the graphite granules of said graphite A, wherein the graphite granules of said graphite A have a core-shell structure having an unimproved graphite granule as the core and a carbon layer coating on the surface of said unimproved graphite granule as the shell, and wherein the specific surface area of the graphite granules of said graphite A is between 0.96 m 2 /g. and 5.73 m 2 /g.