| 摘要 |
Manufactured is a lithium secondary battery anode active substance composed of a petroleum-based heavy oil and a carbon material using at least one petroleum-based heavy oil as starting material. For said active substance, interval d002 of the crystal plane measured by X-ray diffraction is 0.340 nm or larger. The crystallite size Lc (110) in the direction of the C axis is 10 nm or smaller. The intensity ratio (R = I1360/I1580) of the diffraction peak near 1360 cm-1 to the diffraction peak near 1580 cm-1 measured by the Raman spectral method is in the range of 0.8-1.2. The total porosity volume on the surface is 0.02 cc/g or higher. The volume of pores of 10 nm or smaller is in the range of 0.01-0.1 cc/g, and the pore area is 50 m2/g or larger. |
