▎ 摘　　要

NOVELTY - Production of three-dimensional graphene/nickel hydroxide composite electrode material involves placing three-dimensional graphene/copper-nickel alloy in ferric chloride and hydrochloric acid, performing corrosion treatment, rinsing obtained self-supporting three-dimensional graphene with deionized water, soaking obtained three-dimensional graphene in nitric acid solution, washing, immersing the cleaned three-dimensional graphene in a mixed solution of nickel chloride and urea, growing for 2-8 hours, rinsing obtained material with deionized water, and vacuum-drying. USE - Production of three-dimensional graphene/nickel hydroxide composite electrode material used for preparing composite electrode for supercapacitor and battery. ADVANTAGE - The method enables production of three-dimensional graphene/nickel hydroxide composite electrode material with ultra-high surface area, high storage capacity, multiple ion transport channels and improved charge transfer efficiency. DETAILED DESCRIPTION - Production of three-dimensional graphene/nickel hydroxide composite electrode material involves pressing a foamed nickel having thickness of 1.6 mm by a flattening machine, obtaining a foamed nickel sheet having thickness of 0.25 mm, washing the foamed nickel sheet using ethanol, deionized water and 5M hydrochloric acid solution, placing foamed nickel sheet in a mixed solution of copper sulfate pentahydrate and boric acid, depositing copper for 50-150 minutes by electrochemical three-electrode method, obtaining a copper foamed nickel sheet, placing the copper foamed nickel sheet in a constant temperature zone of a chemical vapor deposition (CVD) tube furnace, introducing 5 sccm argon and 1 sccm hydrogen, annealing at 1100 degrees C for 0.5-2 hours, placing obtained copper-nickel alloy in a mixed solution of copper sulfate pentahydrate and boric acid, performing selective electrochemical corrosion treatment for 500-1500 seconds, obtaining three-dimensional copper-nickel alloy skeleton having a multi-channel pore network structure, placing the three-dimensional copper-nickel alloy skeleton in a constant temperature zone of a tube furnace of a CVD system, introducing 20 sccm mixed gas of argon and hydrogen gas for 5-10 minutes, heating to 600 degrees C, introducing 2-20 sccm ethylene, maintaining the same atmosphere for 5-10 hours, cooling the tube furnace to room temperature, obtaining three-dimensional graphene/copper-nickel alloy, placing three-dimensional graphene/copper-nickel alloy in 0.5-2M ferric chloride and 1-3M hydrochloric acid, performing corrosion treatment for 24 hours, obtaining a self-supporting three-dimensional graphene, rinsing the self-supporting three-dimensional graphene with deionized water, soaking obtained three-dimensional graphene in 4M nitric acid solution for 2 hours, washing with deionized water, adding a mixed solution of nickel chloride and urea to a reactor, immersing the cleaned three-dimensional graphene in a mixed solution of nickel chloride and urea, growing for 2-8 hours, rinsing obtained three-dimensional graphene/nickel hydroxide material with deionized water and vacuum-drying at 60 degrees C.