CARBONACEOUS MATERIAL AND LITHIUM SECONDARY BATTERY, AND METHOD FOR PRODUCING CARBONACEOUS MATERIAL

摘要

PROBLEM TO BE SOLVED: To obtain a carbonaceous material superior in high charge or discharge capacity and cycle property simultaneously. SOLUTION: A complex particle 3 which contains at least silicon and carbon and the particle diameter of which is smaller than that of a graphite particle 2 is arranged to be dispersed around the graphite particle 2 of which the facial distance d002 of face (002) is less than 0.337 nm by X-ray wide angle diffraction. The graphite particle 2 and the complex particle 3 are coated with an amorphous carbon film 4 of which the facial distance d002 is 0.37 nm or more. On the characteristics of the carbonaceous material 1, the complex particle 3 consists of a conductive carbon material arranged around an Si fine particle which consists of crystalline silicon and the Si fine particle in which an SiO2 phase and an SiC phase are deposited in a crystalline Si phase.