METHOD FOR PRODUCING AMORPHOUS CARBON PARTICLES, AMORPHOUS CARBON PARTICLES, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY

A method for producing amorphous carbon particles includes a step of adding and mixing graphite particles into a precursor of amorphous carbon, and then performing cross-linking treatment to obtain a first cross-linked product, or a step of subjecting the precursor of amorphous carbon to cross-linking treatment, and then adding and mixing the graphite particles thereinto to obtain a second cross-linked product; and a step of subjecting the first or second cross-linked product to infusibility-imparting treatment, and then performing baking to obtain amorphous carbon particles which contain the graphite particles.