▎ 摘　　要

NOVELTY - Composite heat-storage material comprises 50-80 pts. wt. polymer matrix, 5-20 pts. wt. reduced graphene, 0.5-2 pts. wt. modifier and 5-10 pts. wt. inorganic nanoparticles, where the modifier comprises copolymer of glycidyl methacrylate and 4-vinylpyridine. USE - As composite heat-storage material. ADVANTAGE - The heat-storage material has improved thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the heat-storage material, comprising (a) adding modifier to solvent, stirring for 1-2 hours under heating, adding reduced graphene, continuously stirring for 3-5 hours and ultrasonically mixing for 30-60 minutes, and (b) adding polymer matrix and inorganic nanoparticles to the reaction liquid, stirring vigorously for 5-10 hours, ultrasonically mixing for 30-60 minutes, filtering and drying to obtain the product.