▎ 摘　　要

NOVELTY - A three dimensional porous graphene composite material is prepared by: preparing divalent metal cation chloride salt or nitrate salt aqueous solution A, trivalent metal cation chloride salt or nitrate water solution B, dispersing organic anion into solvent D to obtain solution C, adding dropwise solutions A and B, adding sodium hydroxide solution to adjust pH, and aging; and# deionized water washing, filtering, vacuum drying, sintering under inert gas protection, cooling to room temperature, deionized water washing, removing impurity, and vacuum drying. USE - Method for preparing three dimensional porous graphene composite material (claimed). ADVANTAGE - The material has low cost, and adjustable surface area and pore volume. The method is mild and fit for large scale mass production. DETAILED DESCRIPTION - A three dimensional porous graphene composite material is prepared by: (A) preparing divalent metal cation chloride salt or nitrate salt aqueous solution A, trivalent metal cation chloride salt or nitrate water solution B, dispersing organic anion into solvent D to obtain solution C, adding dropwise solutions A and B, adding 30% sodium hydroxide solution to adjust pH to 6.0-12.0, and aging at 50-90 degrees C for 10-18 hours; and (B) deionized water washing to pH of 7-8, filtering, vacuum drying at 50-100 degrees C for 3-8 hours, placing into tube type furnace, sintering under inert gas protection at 600-1600 degrees C, constant temperature sintering for 1-6 hours, cooling to room temperature, deionized water washing, removing impurity, and vacuum drying to 80 degrees C.