▎ 摘　　要

NOVELTY - Preparing graphene-based three-dimensional macro body comprises providing graphene oxide dispersion solution, adding structural retention agent containing cations to obtain a uniformly-dispersed mixed solution, making the oxygen containing functional group of graphene oxide to keep the structural retention agent containing, carrying out hydrothermal reaction in the mixed solution to obtain graphene-based gel, removing the solvent from the graphene-based gel at under standard atmospheric pressure to obtain the graphene-based three-dimensional macro body. USE - The method is useful for graphene-based three-dimensional macro body (claimed). DETAILED DESCRIPTION - Preparing graphene-based three-dimensional macro body comprises providing graphene oxide dispersion solution with a pH value less than or equal to 7, adding a structural retention agent containing cations into the graphene oxide dispersion solution to obtain a uniformly-dispersed mixed solution, making the oxygen containing functional group of graphene oxide to keep the structural retention agent containing cations through Van der Waals forces, where the mol ratio of the cations of the structural retention agent to oxygen-containing functional groups of the graphene oxide in the graphene oxide dispersion solution is greater than or equal to 0.5 and less than or equal to 1.5, the structural retention agent is manganese chloride, ferric chloride, ferric sulfate, aluminum chloride, magnesium chloride, tetramethyl ammonium acetate, tetramethyl ammonium chloride, tetraethyl ammonium acetate, tetraethyl ammonium chloride, tetrabutyl ammonium chloride or tetrabutyl ammonium acetate, carrying out hydrothermal reaction in the mixed solution at 20-500 degrees C for 0.1-100 hours to obtain graphene-based gel, removing the solvent from the graphene-based gel at 0-300 degrees C under standard atmospheric pressure less than or equal to 0.7 to obtain the graphene-based three-dimensional macro body. INDEPENDENT CLAIMS are also included for: (1) graphene-based three-dimensional macro body comprising a pore structure of three dimensional network structure having overlapping graphene sheets, where the pore structure comprises a micro-pore with the diameter 2nm, a meso-pore with the aperture 2-50 nm and a macro-pore with the aperture 50 nm; and (2) an electrode material comprising graphene-based three-dimensional macro body.