▎ 摘　　要

NOVELTY - Composite nano-scale carbon-based chemical heat storage material comprises inorganic salt hydrate and carbon material. The mass ratio of the inorganic salt hydrate and the carbon material is 2-4:5. The inorganic salt hydrate is calcium sulfate dihydrate, calcium chloride dihydrate, magnesium sulfate heptahydrate, magnesium chloride hexahydrate, copper(II) sulfate pentahydrate, copper(II) chloride dihydrate or aluminum sulfate octadecahydrate. The carbon material is composite carbon material prepared from single-walled carbon nanotubes and graphene. USE - The composite nano-scale carbon-based chemical heat storage material is useful for floor heating (claimed). ADVANTAGE - The composite nano-scale carbon-based chemical heat storage material: has high heat storage density. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing composite nano-scale carbon-based chemical heat storage material, comprising (i) taking the inorganic salt hydrate, adding deionized water and configuring to obtain an inorganic salt solution of 4.5-8.2 g/litre, (ii) adding the inorganic salt solution into the carbon material, uniformly stirring, then hydrothermally reacting at 140-180 degrees C for 18-25 hours, where the volume ratio of the carbon material and the inorganic salt solution is 1:0.85-1.2 and (iii) drying the reaction solution obtained in step (ii) in vacuum to obtain final product.