▎ 摘　　要

NOVELTY - The three-dimensional graphene elastic sponge and carbon nanotubes composite material comprises carbon nanotubes that are grown in inner holes of graphene sponge. The composite material has same thermal conductivity in all directions, thermal conductivity coefficient of greater than or equal to 10 W/(m.k), same compression rebound resilience, and compression rebound rate of 20-90%. USE - Three-dimensional graphene elastic sponge and carbon nanotubes composite material (claimed). ADVANTAGE - The three-dimensional graphene elastic sponge and carbon nanotubes composite material has isotropic high thermal conductivity and elasticity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of three-dimensional graphene elastic sponge and carbon nanotubes composite material, which involves (1) charging aqueous dispersion of graphene oxide into a hydrothermal reaction kettle, heat-preserving at 150-180 degrees C for 10-18 hours, cooling to room temperature to obtain sponge, freezing the sponge, and freeze-drying in a freeze drier to obtain three-dimensional graphene sponge, (2) mixing anhydrous ethanol, xylene and ethylenediamine to prepare solution as carbon source for growing carbon nanotubes, and dissolving the ferrocene into the solution as catalyst, and (3) placing the prepared three-dimensional graphene sponge in a tubular furnace, heating under protection of argon, when the temperature is higher than 400 degrees C, introducing hydrogen, increasing the temperature to 700-900 degrees C, injecting carbon source solution containing ferrocene into a tubular furnace, growing under heat-preserving temperature, cooling to room temperature under the protection of argon gas.