▎ 摘　　要

NOVELTY - Producing silicon-graphene composite powder comprises (a) electrospraying spray solution containing silicon and graphene, and (b) filtering the electrosprayed spray solution and drying to prepare silicon-graphene composite. USE - The silicon-graphene composite powder is useful in secondary battery (claimed). ADVANTAGE - The silicon-graphene composite powder exhibits effect of suppressing volume expansion, improves conductivity and capacity retention, and reduces side reactions with electrolyte. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for silicon-graphene composite powder produced by the above method, having core-shell shape including core and shell, where the core is silicon, and the shell is graphene.