▎ 摘　　要

NOVELTY - The preparation method of nano tin dioxide/graphene composite material involves carrying out in situ synthesis of nano tin dioxide particles in aqueous solution, dispersing graphene oxide in distilled water, ultrasonically dispersing to obtain homogeneous dispersion liquid, dissolving calcium chloride dihydrate in distilled water to obtain homogeneous dispersion liquid, mixing the two dispersion liquids, mixing and carrying out amination, and evaporation, drying, and carrying out annealing treatment at 500-600 degrees C for 1-3 hours in an inert atmosphere. USE - Preparation of nano tin dioxide/graphene composite material for lithium ion battery (claimed).