Patent ID: 6156432
Filing Date: 2000-12-05
Classification: C01B,C01P,H01M,Y02E,Y10T

Abstract:
A graphite material satisfying the following characteristics requirements:(A) The interplanar spacing (d.sub.002) determined by wide-angle X ray diffractometry for the plane (002) is not more than 0.336 nm;(B) The cavity index (CI) defined by the following expression is not less than 0.019: ##EQU3## where D represents the density, c.sub.0 and Lc represent the lattice constant and crystallite size, respectively, in the direction of c axis, a.sub.0 and La represent the lattice constant and crystallite size, respectively, in the direction of a axis, and the superscript ""i"" represents the value for an ideal graphite; the density value is the value obtained by the method according to JIS R 7212 and the crystallite size value is the value obtained by the method established by the Japan Society for the Promotion of Science;(C) The discharge capacity exceeds 372 Ah/kg.