Patent ID: 10748672

Abstract:
A process for producing a solid graphene foam composed of multiple pores and pore walls The process comprises: (a) preparing a graphene dispersion having a graphene material dispersed in a liquid medium, which contains an optional blowing agent; (b) dispensing and depositing the graphene dispersion onto a supporting substrate to form a wet layer of graphene material having a preferred orientation; (c) partially or completely removing the liquid medium from the wet layer of graphene material to form a dried layer of graphene material having a content of non-carbon elements no less than 5% by weight (including blowing agent weight); and (d) heat treating the layer of graphene material at a first heat treatment temperature from 80° C. to 3,200° 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 the graphene foam having a density from 0.01 to 1.7 g/cm3 or a specific surface area from 50 to 3,000 m2/g.