▎ 摘　　要

NOVELTY - Preparation of graphene conductive foam includes obtaining graphene oxide; immersing and dispersing the foam into water with graphene oxide; coating the graphene oxide on the surface of the foam by padding process; immersing into aqueous solution containing reducing agent and conducting reduction reaction; and obtaining conductive foam having surface coated with graphene conductive layer. USE - Preparation of graphene conductive foam (claimed). ADVANTAGE - The graphene conductive foam has low density, high conductivity, large specific surface area, and low cost. DETAILED DESCRIPTION - Preparation of graphene conductive foam comprises: (A) adding sodium nitrate into concentrated sulfuric acid as reaction liquid, where content of sodium nitrate is 1-2 mass%; and adding graphite sheet into the reaction liquid at 1:80-100 mass ratio; (B) adding potassium permanganate into the reaction liquid; heating at 35-40 degrees C; and heat preserving for 60-90 minutes, where mass ratio of potassium permanganate and graphite sheet is 6-10:1; (C) adding water while magnetically stirring; heating at 85-95 degrees C; and heat preserving for 60-90 minutes, where mass ratio of water and graphite sheet is 350-400:1; (D) adding hydrogen peroxide (30 mass%); stirring for 5-10 minutes; and filtering, where mass ratio of hydrogen peroxide and graphite sheet is 5-6:1; (E) dispersing the filtrate with water; and centrifugally separating by centrifugal machine at 1000-2000 revolutions/minute (rpm); (F) dispersing the product produced by the first centrifugal separation with water; and performing second centrifugal separation by centrifugal machine at 8000-10000 rpm; (G) adding water into the product produced by second centrifugal separation; ultrasonically separating; and obtaining graphene oxide; (H) immersing and dispersing the foam into water with graphene oxide; and coating the graphene oxide on the surface of the foam by padding process, where mass ratio of foam and graphite sheet is 1-20:1; and (I) immersing into aqueous solution containing reducing agent and conducting reduction reaction; and obtaining conductive foam having surface coated with graphene conductive layer, where mass ratio of reducing agent in the aqueous solution and graphite sheet is 2-10:1.