▎ 摘　　要

NOVELTY - Preparation of highly specific surface area and high-conductivity graphene composite carbon aerogel comprises dispersing graphene oxide in deionized water, dissolving resorcinol and formaldehyde in aqueous graphene solution, adding catalyst, adding nitric acid solution dropwise, stirring to obtain precursor solution, incubating precursor solution, pickling in ethanol and acetic acid mixture, replacing solvent with anhydrous ethanol, drying to obtain graphene oxide/RF organic aerogel, and subjecting graphene oxide/RF organic aerogel to high temperature carbonization. USE - Method for preparing highly specific surface area and high-conductivity graphene composite carbon aerogel used for high temperature heat insulating material, adsorption material, super capacitor, and lithium ion battery electrode material (claimed). ADVANTAGE - The composite material has low apparent density, high specific surface area, and excellent electrical conductivity and thermal conductivity making it easy to be processed into molded product. DETAILED DESCRIPTION - Preparation of highly specific surface area and high-conductivity graphene composite carbon aerogel comprises dispersing graphene oxide in deionized water by ultrasonication to obtain stable aqueous solution of graphene oxide at mass concentration of 5-0 mg/mL; dissolving resorcinol and formaldehyde with molar ratio of 1:2 in obtained aqueous graphene solution, where total mass ratio of graphene and resorcinol and formaldehyde is 5-50:100, adding catalyst at molar ratio with resorcinol of 50:1, insulating at room temperature, adding nitric acid solution dropwise, adjusting pH of mixture to 5.4-5.6, and stirring at room temperature for 2 hours to obtain precursor solution; incubating precursor solution at 85 degrees C for 5-7 days to prepare graphene oxide/resorcinol-formaldehyde (RF) organic wet gel; subjecting obtained graphene oxide/ RF organic wet gel to pickling in mixture of ethanol and acetic acid at volume ratio of 7:3 under water bath heating, replacing solvent with anhydrous ethanol, and drying to obtain graphene oxide/RF organic aerogel, denoted as GO-RF-X; and subjecting graphene oxide/RF organic aerogel to high temperature carbonization to obtain graphene composite carbon aerogel, denoted as GNS/CAs-X. The GNS/CAs-X has cascade pore structure formed by covalent bond crosslinking. It has density of 23.5-70.5 mg/cm3 and specific surface area of 2563-3214 m2/g, and with excellent electrical and thermal properties.