▎ 摘　　要

NOVELTY - Acoustic-thermal energy conversion type complex phase change energy storage material comprises a three-dimensional network framework and an organic solid-liquid phase change material filled between the three-dimensional network framework. The three-dimensional network framework is a three-dimensional network structure formed by connecting graphene oxide nanosheets with metal oxide nanoparticles on the surface. USE - The material is useful for acoustic-thermal converter (claimed). ADVANTAGE - The material: is economical; has simple synthesis process and low energy consumption; adopts the 'one-pot method' to construct a three-dimensional network through the coordination and complexation of metal ions and carboxy functional groups on the surface of graphene oxide nanosheets to load phase change materials in situ; alkalizes part of the metal ions; reduces to produce metal oxide nanoparticles; and realizes complex with phase change materials. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the acoustic-thermal energy conversion type complex phase change energy storage material, comprising (i) preparing the mixed system of graphene oxide nanosheets and organic solid-liquid phase change materials, (ii) using metal ions as the crosslinking agent and the mixed system obtained in the step (i) and performing sol-gel method to prepare a complex phase change hydrogel, and (iii) complexing the complex phase change hydrogel obtained in the step (ii), carrying out alkalization reduction, allowing to stand, freezing and drying.