▎ 摘　　要

NOVELTY - A graphene oxide-nickel-cobalt sulfide-nickel-molybdenum layered double hydroxide (LDH) composite material comprises graphene oxide as a matrix material, sheet-shaped nickel-cobalt sulfide and nano-flower-shaped nickel-molybdenum LDH. The microscopic appearance of the matrix material is a nanosheet structure, which acts as a conductive substrate to facilitate ultra-high-speed transport of electrons. The microstructure of nickel-cobalt sulfide is a nanosheet structure loaded on the surface of graphene oxide to provide additional pseudocapacitance. The microstructure of nano-flower-shaped nickel-molybdenum LDH is nanosheet structure embedded on the surface of the nickel-cobalt sulfide nanosheet structure to increase specific surface area of nickel-cobalt sulfide. USE - Graphene oxide-nickel-cobalt sulfide-nickel-molybdenum layered double hydroxide composite material is used as electrode material in supercapacitor (claimed). ADVANTAGE - The graphene oxide-nickel-cobalt sulfide-nickel-molybdenum layered double hydroxide composite material has excellent electrochemical performance and electrochemical cycle stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: 1. preparation of the graphene oxide-nickel-cobalt sulfide-nickel-molybdenum LDH composite material, which involves dissolving nickel acetate tetrahydrate, cobalt acetate tetrahydrate and thiourea in ethylene glycol, adding graphene oxide aqueous solution, hydrothermally reacting, washing the reaction product with distilled water and absolute ethanol, drying to obtain graphene oxide-nickel-cobalt sulfide (NiCo2S4), dissolving nickel nitrate, sodium molybdate and urea in water to obtain a mixed solution, adding graphene oxide-nickel-cobalt sulfide, hydrothermally reacting, washing the reaction product with distilled water and absolute ethanol, and drying; and 2. application of the composite material as an electrode material in supercapacitor. The charging and discharging of the electrode material is 0-0.5 V. When the discharge current density of the electrode material is 1 A/g, the specific capacitance is 1300-1400 F/g.