▎ 摘　　要

NOVELTY - Method for preparing a graphene macroscopic material involves filtering the graphene dispersion to obtain a graphene macroscopic portion with a three-dimensional network structure, where the graphene in the graphene dispersion comprises a first type of graphene and a second type of graphene, and in terms of lateral dimensions, the average value of the first type of graphene is at least 4 times larger than the average value of the second type of graphene. USE - The method is used for preparing a graphene macroscopic material which is used for preparing graphene/polymer composite material used in a thermally conductive composite material and as a fuel cell bipolar plate (all claimed), and in thermal interface materials. ADVANTAGE - The method is simple in operation, economical and controllable in macro structure, and has excellent thermal and electrical properties of graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene/polymer composite material comprising the graphene macroscopic material obtained by the above-mentioned method comprising compositing with a polymer to obtain a graphene/polymer composite material, where the polymer is an elastic material and/or an inelastic material, the elastic material is chosen from silica gel, rubber, and/or latex, the non-elastic material is chosen from polyimide, epoxy resin, polypropylene, polyethylene, polyphenylene sulfide, polyamide, polycarbonate, and/or polyvinyl chloride, the compounding specifically involves pouring the polymer into the graphene macroscopic material and curing, the pouring has pouring pressure is 0.001-0.02 MPa and pouring time is 0.5-24 hours, and curing at 25-165 degrees C, for 0.5-16 hours.