COKE, ARTIFICIAL GRAPHITE, METHOD OF MANUFACTURING CARBON MATERIAL FOR NEGATIVE ELECTRODE OF NONAQUEOUS SOLVENT SECONDARY BATTERY, AND PITCH COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing coke having high productivity and high density, capable of avoiding forming of mesophase, to provide a method of manufacturing artificial graphite excellent in graphitization property from the coke, and to provide a method of manufacturing a carbon material for a nonaqueous solvent negative electrode material of a lithium ion secondary battery and the like having high discharge capacity and high charge and discharge efficiency from the coke. SOLUTION: A pitch composition obtained by mixing coal tar pitch of 10-1000 pts.wt. to mesophase pitch of 100 pts.wt. is heat-treated to produce coke, artificial graphite is produced by graphitizing the coke at a temperature not less than 2000 deg.C, and a carbon material for the negative electrode of the nonaqueous solvent secondary battery is produced by grinding the coke and graphitizing it at a temperature of not less than 2000 deg.C.