▎ 摘　　要

NOVELTY - A graphene-polypyrrole-cobalt nickel double metal hydroxide composite is obtained by performing hydrothermal reaction of cobalt nitrate, nickel nitrate, hexamethylenetetramine and urea, to obtain cobalt-nickel double-metal hydroxide, and performing in-situ chemical polymerization using mixture of graphene and polypyrrole as a base material, such that the cobalt-nickel double-metal hydroxide is supported on the base material. USE - Graphene-polypyrrole-cobalt nickel double metal hydroxide composite is used as electrode material for supercapacitor (claimed). ADVANTAGE - The graphene-polypyrrole-cobalt nickel double metal hydroxide composite has excellent electrochemical characteristics, and can be prepared by simple process. Since the cobalt-nickel double metal hydroxide is distributed on the surface of the base material, the electroconductivity of the material is improved. The supercapacitor obtained using the composite has specific capacitance of 2500-2600 F/g, when discharge current density is 1 A/g, and charge and discharge rate is 0-0.35 V. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the composite, which involves dissolving hydrochloric acid and pyrrole in aqueous solution, adding graphene, ultrasonically dispersing, obtaining solution (M), adding ammonium persulfate aqueous solution, magnetically stirring, reacting for 2-4 hours, filtering, washing, drying, obtaining graphene-polypyrrole composite material, adding cobalt nitrate, nickel nitrate, hexamethylenetetramine and urea, mixing uniformly, performing hydrothermal reaction, filtering the resultant reaction mixture, washing and drying.