▎ 摘　　要

NOVELTY - A nano-tin diselenide/graphene composite material is obtained by growing diselenide particles having average particle size of 3-10 nm on surface of graphene. USE - Nano-tin diselenide/graphene composite material is used for forming negative electrode material of lithium-ion battery and sodium-ion battery (all claimed). ADVANTAGE - Nano-tin diselenide/graphene composite material has excellent adhesiveness of tin diselenide and graphene, and can be papered by effectively compounding carbon material and tin diselenide, and provides battery having excellent charge and discharge performance and stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nano-tin diselenide/graphene composite material.