▎ 摘　　要

NOVELTY - Preparing graphene/nickel oxide composite materials e.g. (1) ultrasonically dispersing graphene in electrolyte solution, where the electrolyte solution includes nickel nitrate, nickel sulfate, and/or nickel chloride aqueous solution; (2) soaking the anode of the graphite plate and cathode of copper rod in the electrolyte solution after completely dispersing graphene in electrolyte solution, respectively connecting the cathode electrode and the anode electrode to the cathode and the anode of the direct current power supply, turning on the power to form stable plasma arc area between the cathode electrode and anode electrode so that continuous and uniform nickel oxide is formed on graphene surface; and (3) suction filtering the modified electrolyte solution, drying to obtain graphene/nickel oxide composite material, mixing dried graphene/nickel oxide composite material, acetylene black, and polyvinylidene fluoride, grinding and evenly coating on foamed nickel. USE - The electrode material is used as anode material in a super capacitor (claimed). ADVANTAGE - The method: can actively solves the problem of graphene easy to agglomerate; can coats a uniform, continuous and dense nickel oxide on the surface of graphene; has high efficiency; and is fast, economical and environmentally-friendly. DETAILED DESCRIPTION - Preparing graphene/nickel oxide composite materials (1) ultrasonically dispersing graphene in electrolyte solution, where the electrolyte solution includes nickel nitrate, nickel sulfate, and/or nickel chloride aqueous solution, the concentration of salt in the electrolyte solution is 5-20 g/l, and the concentration of graphene is 25-50 mg/l; (2) soaking the anode of the graphite plate and cathode of copper rod in the electrolyte solution after completely dispersing graphene in electrolyte solution, respectively connecting the cathode electrode and the anode electrode to the cathode and the anode of the direct current power supply, where the power supply voltage is 100-220 V, turning on the power for 60-120 seconds to form stable plasma arc area between the cathode electrode and anode electrode so that a continuous and uniform nickel oxide is formed on the graphene surface; (3) suction filtering the modified electrolyte solution, drying to obtain graphene/nickel oxide composite material, mixing the dried graphene/nickel oxide composite material, acetylene black, and polyvinylidene fluoride in mass ratio of 8:1:1, grinding and evenly coating on the foamed nickel, and drying; and (4) rolling and pressing the dried foamed nickel with tablet machine, to obtain graphene/nickel oxide composite electrode sheet. In the method, copper rod-assisted cathode plasma electrolysis to prepare graphene/nickel oxide composite electrode materials. An INDEPENDENT CLAIM is also included for the graphene/nickel oxide composite electrode sheet is prepared by above mentioned method.