METHOD FOR PRODUCING HARDLY GRAPHITIZABLE CARBON MATERIAL, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY

摘要

A method for producing a hardly graphitizable carbon material, which is characterized by comprising: a step wherein a starting material for a hardly graphitizable carbon material is subjected to a crosslinking treatment, thereby obtaining a crosslinked product; a step wherein the crosslinked product is subjected to an infusibilization treatment, thereby obtaining an infusibilized product; and a step wherein the infusibilized product is fired, thereby obtaining a hardly graphitizable carbon material. The method for producing a hardly graphitizable carbon material is also characterized in that the crosslinked product or the infusibilized product is subjected to a mechanochemical treatment.