▎ 摘　　要

NOVELTY - Preparing graphene material comprises coating graphene oxide slurry on surface of substrate, and setting the first layer of template after coating; drying graphene oxide slurry between substrate and first layer template to form the first layer of graphene oxide coating; coating graphene oxide slurry on the first layer template, and setting the second layer template after coating; drying the graphene oxide slurry between the first layer template and the second layer template to form a second layer of graphene oxide coating; repeating the steps of coating the graphene oxide slurry, setting the template and drying to a predetermined thickness to obtain the graphene oxide blank; carrying out heat treatment to graphene oxide blank, obtaining a graphene material composed of multiple graphene layers, with layered gaps between the upper and lower adjacent graphene layers and plurality of graphene columns distributed between the layered gaps; where, the template is foam material. USE - The graphene material useful for preparing graphene heat-conducting pad. ADVANTAGE - The method: is simple. DETAILED DESCRIPTION - Preparing graphene material comprises coating graphene oxide slurry on surface of substrate, and setting the first layer of template after coating; drying graphene oxide slurry between substrate and first layer template to form the first layer of graphene oxide coating; coating graphene oxide slurry on the first layer template, and setting the second layer template after coating; drying the graphene oxide slurry between the first layer template and the second layer template to form a second layer of graphene oxide coating; repeating the steps of coating the graphene oxide slurry, setting the template and drying to a predetermined thickness to obtain the graphene oxide blank; carrying out heat treatment to graphene oxide blank, obtaining a graphene material composed of multiple graphene layers, with layered gaps between the upper and lower adjacent graphene layers and plurality of graphene columns distributed between the layered gaps; where, the template is foam material; template is provided with through hole passing through the template along the thickness direction. An INDEPENDENT CLAIM is also included for the graphene heat-conducting pad, is prepared by immersing graphene material in macromolecule polymer, taking out and waiting for curing, cutting the graphene material into slices along thickness direction, to obtain a graphene thermal pad; in graphene thermal pad, the weight of graphene is 30-70 wt.%, the weight of graphene is 40-60 wt.%.