▎ 摘　　要

NOVELTY - Producing a metal-bonded graphene foam product involves preparing a graphene dispersion having multiple graphene sheets dispersed in a liquid medium, where the graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements greater than 2 wt.%. The non-carbon elements are selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, or their combination. The graphene dispersion contains an optional blowing agent having a blowing agent-to-graphene material weight ratio of 0/1-1/1. The graphene dispersion is dispensed and deposited onto a surface of a supporting substrate to form a wet layer of graphene. The liquid medium is partially or completely removed from the wet layer of graphene to form a dried layer of graphene. USE - Method for producing metal-bonded graphene foam product for thermal management device, and as heat dissipation or heat spreading element for smart phone, tablet computer, digital camera, display device, flat-panel TV, or LED lighting device. ADVANTAGE - The method enables to prepare metal-bonded graphene foam product that exhibits not only a controllable porosity and density, but also excellent elasticity. It also exhibits a high thermal conductivity and high electrical conductivity not just along the in-plane directions, but also in the through-plane direction (thickness-direction). DETAILED DESCRIPTION - Producing a metal-bonded graphene foam product involves preparing a graphene dispersion having multiple graphene sheets dispersed in a liquid medium, where the graphene sheets are selected from a pristine graphene or a non-pristine graphene material, having a content of non-carbon elements greater than 2 wt.%. The non-carbon elements are selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, chemically functionalized graphene, or their combination. The graphene dispersion contains an optional blowing agent having a blowing agent-to-graphene material weight ratio of 0/1-1/1. The graphene dispersion is dispensed and deposited onto a surface of a supporting substrate to form a wet layer of graphene. The liquid medium is partially or completely removed from the wet layer of graphene to form a dried layer of graphene. The dried layer of graphene is subjected to heat treatment at a first heat treatment temperature of 80-3,200 degrees C at a desired heating rate sufficient to induce volatile gas molecules from the non-carbon elements or to activate the blowing agent for producing a sheet or roll of solid graphene foam having multiple pores and pore walls containing graphene sheets. The metal is impregnated or infiltrated into the pores to form metal-bonded graphene foam product, where the metal is bonded to graphene sheets of the pore walls.