| 摘要 |
A carbonaceous material for a negative electrode in which a true density of 1.65 g/cc to 1.85 g/cc, a content of hydrogen with respect to carbon is 0.01 to 0.15 in terms of an atomic ratio, intervals between (002) planes are 3.45 ANGSTROM to 3.55 ANGSTROM , the thickness of crystalline is 12.0 ANGSTROM to 20.0 ANGSTROM , and assuming that an area enclosed by a base line which is a common tangent line connecting minimal values on the two sides of a (002) diffraction line in a scattered X-ray curve and the (002) diffraction line is S1 and that an area enclosed by a scattered X-ray curve having a diffraction angle 2&thetas; of 4 DEG or more and positioned in lower angle portions as compared with the (002) diffraction line and the base line is S0, an area ratio S0/S1 of S0 with respect to S1 is 0.4 to 2.0. The carbonaceous material for a negative electrode is obtained by oxidizing a carbonaceous raw material containing gamma resin in a quantity of 0.5 wt% to 30 wt% to obtain a carbonaceous precursor of an oxidation product containing oxygen with respect to carbon at an atomic ratio of 0.01 to 0.2 and by calcinating the carbonaceous precursor in an inactive atmosphere. <IMAGE> |
