▎ 摘　　要

NOVELTY - Graphene aerogel thermo-chemical energy storage composite material regulated by pH and temperature, comprises a graphene aerogel porous carrier, and an inorganic salt heat storage medium filled in the graphene aerogel porous carrier, where the load capacity of the inorganic salt heat storage medium is 85-97 wt.% total mass of the composite material. USE - Graphene aerogel thermochemical energy storage composite material regulated by pH and temperature, used in medium and low temperature thermochemical energy storage. ADVANTAGE - The graphene aerogel is used as the porous carrier, which effectively increases the load of the inorganic salt heat storage medium, while avoiding the problems of easy agglomeration of the inorganic salt and unstable cycle performance. The reduction degree of graphene aerogel is controlled by pH or reduction temperature, so that obtained thermochemical energy storage composite material has characteristics of adjustable heat storage properties such as adsorption rate, dehydration temperature and heat storage density, that meets different application requirements in the field of medium and low temperature thermochemical energy storage. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene aerogel thermochemical energy storage composite material regulated by pH and temperature, which involves: (1) dispersing oxidized graphite in water, carrying out ultrasonic stripping to obtain an oxidized graphene aqueous solution, and adjusting the pH value; (2) carrying out hydrothermal reduction on the graphene oxide aqueous solution with the adjusted pH value to obtain graphene hydrogel; (3) carrying out vacuum freeze drying on the obtained graphene hydrogel to obtain graphene aerogel; (4) soaking the graphene aerogel in an aqueous solution of an inorganic salt heat storage medium, and drying to obtain a target product.