▎ 摘　　要

NOVELTY - A graphene/carbon nanotube composite low-temperature phase change material comprises a graphene-based phase change material comprising few-layer graphene and inorganic crystalline hydrated salt material and/or low-melting point alloy material, and 0.1-1 wt.% carbon nanotubes. USE - Graphene/carbon nanotube composite low-temperature phase change material for preparing phase change energy storage device (claimed). ADVANTAGE - The composite low-temperature phase change material has excellent thermal conductivity, small phase change volume, large phase change latent heat, and improved thermal conductivity coefficient. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the graphene/carbon nanotube composite low-temperature phase change material, which involves mixing the graphene-based phase change material and carbon nanotubes by ball milling and/or stirring for 15-20 hours.