▎ 摘　　要

NOVELTY - Graphene oxide is added to acetonitrile solution and dispersed. Cobalt sulfate, nickel sulfate and sodium tungstate are added to acetonitrile solution and stirred. The acetonitrile solution is dispersed. Sodium borohydride is weighed, and water is added to mixture, to obtain sodium borohydride aqueous solution. Aqueous sodium borohydride solution is dripped to acetonitrile solution, reacted, filtered, washed, and dried, to obtain powder. Powder is added to hydrogen peroxide and oxidized, to obtain flower-like cobalt-nickel-tungsten alloy oxide-graphene composite. USE - Preparation of cobalt-nickel-tungsten alloy oxide-graphene composite material used for electrode material of supercapacitor (claimed). ADVANTAGE - The method enables preparation of three-dimensional flower-shaped cobalt-nickel-tungsten alloy oxide-graphene composite material with excellent electrochemical property and high yield. DETAILED DESCRIPTION - Predetermined amount of graphene oxide is added to acetonitrile solution and ultrasonically dispersed for 1 hour. Predetermined amount of cobalt sulfate, nickel sulfate and sodium tungstate are added to acetonitrile solution and stirred. The acetonitrile solution is placed in ultrasonic cleaner and ultrasonically dispersed. Predetermined amount of sodium borohydride is weighed, and water is added to mixture, to obtain sodium borohydride aqueous solution. Aqueous sodium borohydride solution is dripped to acetonitrile solution, reacted for 2 hours, filtered, washed, and dried, to obtain powder. Powder is added to 5-10 mL hydrogen peroxide and oxidized, to obtain flower-like cobalt-nickel-tungsten alloy oxide-graphene composite. An INDEPENDENT CLAIM is included for usage of cobalt-nickel-tungsten alloy oxide-graphene composite material for electrode of supercapacitor.