▎ 摘　　要

NOVELTY - A encapsulated phase change energy storage composite material comprises organic wax energy storage material as phase change energy storage material, and expanded graphite and nano-graphene sheets as thermal conductivity enhanced package for packaging inside the organic wax energy storage material to form a packaging structure. USE - Encapsulated phase change energy storage composite material (claimed). ADVANTAGE - The encapsulated phase change energy storage composite material has high thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of encapsulated phase change energy storage composite material, which involves mixing the organic wax storage material and expanded graphite, heating at 5-60 degrees , stirring, facilitating uniform self-absorption, and cooling to form granular phase change material capsules, mixing with powdered nano-graphene sheets, uniformly stirring and mixing, heating at 5-100 degrees C, vacuumizing to below 10 Pa, and press-forming.