▎ 摘　　要

NOVELTY - Complex phase change material comprises spongy graphene oxide and phase change substance fixed in spongy graphene oxide, the sponge graphene oxide based on spongy graphene oxide-based composite phase change material without leakage within 250-320 degrees C, the minimum content of olefin is 8-10 wt.%. USE - Used as complex phase change material. ADVANTAGE - The complex phase-change material: is economical; and has small carrier material adding amount, high enthalpy, and small size. The method: is simple and economical; has convenient operation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing complex phase change material, comprising combining the spongy graphene oxide and the phase change material by physical impregnation.