▎ 摘　　要

NOVELTY - Three-dimensional graphene macroscopic material is composed of a graphene tube having a thickness of 0.3-200 nm, diameter of 0.02-50 mu m and a length of 0.2-100 mu m. The graphene tubes in the three-dimensional graphene macroscopic material are connected by covalent linkages. The pore diameter of the network structure is 0.5-100 mu m. The density of the three-dimensional graphene macroscopic material is 0.1-1000 mg/cm3, the electrical conductivity is 0.01-500 S/cm, the compressive strength is 0.0001-200MPa, and the compression modulus is 0.001-2000MPa. USE - Three-dimensional graphene macroscopic material (claimed). DETAILED DESCRIPTION - Three-dimensional graphene macroscopic material is composed of a graphene tube having a thickness of 0.3-200 nm, diameter of 0.02-50 mu m and a length of 0.2-100 mu m. The graphene tubes in the three-dimensional graphene macroscopic material are connected by covalent linkages. The pore diameter of the network structure is 0.5-100 mu m. The density of the three-dimensional graphene macroscopic material is 0.1-1000 mg/cm3, the electrical conductivity is 0.01-500 S/cm, the compressive strength is 0.0001-200MPa, the compression modulus is 0.001-2000MPa and the recoverable elastic deformation is 0.5-0.95. An INDEPENDENT CLAIM is included for preparation of three-dimensional graphene macroscopic material, which involves growing graphene tubes by chemical vapor deposition process using three-dimensional porous substrate as a template, preparing graphite tube by removing the template, drying and subjecting the tube to high-temperature treatment to 1600-2500 degrees C to obtain three-dimensional graphene material.