▎ 摘　　要

NOVELTY - The method involves forming a nano-graphene-metal fused material comprised of nano-graphene and nano-metal (S100). A set of nano graphene-metal fused materials is thermally treated to connect the materials together by melting bonding of the nano metal to form a graphene-graphene fused material (S110), which is formed by coating or attaching a nano metal particle on a surface of the nano graphene, where the material is in a form of a single chain in which the materials are sequentially connected or in a form of a composite chain in which the materials are irregularly connected. USE - Method for preparing a graphene-graphene fused material used in ultra light weight and ultra high conductive materials, heat conduction sheets and electrically conductive polymers. ADVANTAGE - The method enables utilizing the nano graphene-graphene fused material in a graphene-substrate composite, which is used as a material of a flexible substrate and an electrode material of lithium secondary battery and ultra high capacity capacitor, thus providing superior performances in electrical conductivity, heat conductivity and gas barrier. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene-graphene fused material. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart of a method for preparing a graphene-substrate composite. Step for forming nano-graphene-metal fused material (S100) Step for thermally treating nano graphene-metal fused materials (S110) Step for pulverizing graphene-graphene fused material (S120) Step for dispersing graphene-graphene fused material powder in substrate (S130)