ARTIFICIAL GRAPHITE PARTICLE AND METHOD FOR PRODUCING THE SAME, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY NEGATIVE ELECTRODE AND METHOD FOR PRODUCING THE SAME, AND LITHIUM SECONDARY BATTERY

Artificial graphite particles, having a secondary particle structure in which a plurality of primary particles composed of graphite are clustered or bonded together, and having a layer structure in which the edge portion of the primary particles is bent in a polyhedral shape.