▎ 摘　　要

NOVELTY - Thermally conductive composite material comprises a unitary graphene matrix material which is being single crystal or polycrystalline, has a physical density of 1.7-2.24 g/cm3, an inter-graphene spacing (d(002)) of 0.3354-0.4 nm, an oxygen content of 0.001-10%, a degree of graphitization of 1-100% and a thermal conductivity of 600-1800 W/mK, and contains chemically bonded graphene molecules or chemically merged graphene planes. USE - The thermally conductive composite material is useful in an electronic device (claimed) including a CPU, a camera unit, a battery, a supercapacitor or an electric power supply that generates heat when the device is in operation. ADVANTAGE - The thermally conductive composite material: has a porosity level of 0-5%, an electrical conductivity of 1500-25000 S/cm, a tensile strength of 32-200 MPa, a flexural strength of 32-200 MPa, a Rockwell hardness, as measured on the R scale using ASTM D785, of 60-80, and one dimension of 25 centimeter to hundreds of centimeters (claimed); exhibits a combination of exceptionally high thermal conductivity, high electrical conductivity, high mechanical strength, good surface scratch resistance, and good hardness; has no tendency to flake off; and is obtained in simpler (i.e. more reliable), less energy-intensive and highly scalable. DETAILED DESCRIPTION - Thermally conductive composite material comprises a unitary graphene matrix material which is being single crystal or polycrystalline, has a physical density of 1.7-2.24 g/cm3, an inter-graphene spacing (d(002)) of 0.3354-0.4 nm, an oxygen content of 0.001-10%, a degree of graphitization of 1-100% and a thermal conductivity of 600-1800 W/mK, and contains chemically bonded graphene molecules or chemically merged graphene planes, where the graphene planes in a crystal grain are essentially parallel to one another with an average misorientation angle less than 10 degrees , and further comprises a filler or reinforcement phase in the shape of a particle, filament, nanotube, nanowires and/or nanorod, is a metal, ceramic, glass, polymer and/or carbon. INDEPENDENT CLAIMS are also included for: (1) creating (c1) a thermally conductive composite material having a unitary graphene matrix, comprising forming a filler or reinforcement phase into a desired porous shape, impregnating the porous shape with graphene oxide gel to form an impregnated shape, partially or completely removing the fluid medium of the graphene oxide gel from the impregnated shape to form a composite precursor, and heat-treating the composite precursor at a temperature higher than 100 degrees C to form a thermally conductive composite material; and (2) creating (c2) a thermally conductive composite material having a unitary graphene matrix, comprising mixing a filler phase or reinforcement material into graphene oxide gel to form a slurry, dispensing the slurry onto a substrate or into a mold, partially or completely removing the fluid medium from the slurry to form a composite precursor, and heat-treating the composite precursor at a temperature higher than 100 degrees C to form a thermally conductive composite material.