Patent ID: 8404385
Filing Date: 2013-03-26
Classification: C01B,H01M,Y02E

Abstract:
1. A mixed carbon material comprising carbon material A and carbon material B, wherein carbon material A and carbon material B both have cores made of graphite powder and a surface carbon material adhered to and/or coated on at least a portion of the surface of the graphite powder, the surface carbon material is at least one of amorphous carbon and turbostratic carbon, the compressed density characteristic which is defined below is 1.80-1.90 g/cm the average particle diameter of carbon material B is at most 14 μm and is smaller than the average particle diameter of carbon material A, and the specific surface areas of carbon material A and carbon material B are at most 4 m the compressed density characteristic being the density of a powder when 1.00 grams of the powder are packed into a cylindrical mold with a diameter of 15 mm, a pressing force of 8.7 kN is applied to the powder, and then the pressing force is reduced to 0.15 kN.