▎ 摘　　要

NOVELTY - A cobalt oxide/graphene nanocomposite electrode material preparing method involves dissolving graphene oxide dispersant, regulating pH value to prepare oxidized graphene solution. The dispersant is added with divalent cobalt salt and a salt of a metal ion to be doped to obtain divalent cobalt salt mixed solution. Alkaline solution is slowly added to mixed solution, and graphene oxide solution is slowly added to solution. The mixed solution obtained is provided into reactor, followed by adding dispersant and the surfactant of the slurry, and adjusting spray pyrolysis inlet temperature. USE - Method for preparing cobalt oxide/graphene nanocomposite electrode material for hydrothermal coupling spray pyrolysis process. ADVANTAGE - The method enables utilizing high conductivity of graphene on the basis of a metal or a metal oxide doped with ions to enhance the structural stability of cobalt oxide, dynamic fast-drying spray pyrolysis, to avoid the nanocomposite particle growth and agglomeration. The electrode material has good dispersibility and flowability. The hydrothermal coupling spray pyrolysis process is simple, easy to operate control for continuous mass production. DETAILED DESCRIPTION - A cobalt oxide/graphene nanocomposite electrode material preparing method involves dissolving graphene oxide dispersant, regulating pH value of solution to 5-9, ultrasonic mixing to prepare 0.1-100 mg/mL oxidized graphene solution. The appropriate amount of dispersant is added according to the ratio of divalent cobalt salt and a salt of a metal ion to be doped, surfactant is added, dispersed by stirring to obtain 0.05-1 mol/L divalent cobalt salt mixed solution, where the ratio of doped metal ion and divalent cobalt ion of mol ratio of 1: 100-1000, and surface active agent with divalent cobalt salt is 0.01-0.2 wt.%. 0.1-0.2 mol/L alkaline solution is slowly added dropwise to the obtained mixed solution, mixed evenly, and graphene oxide solution is slowly added dropwise to the solution where the amount of graphene oxide in the corresponding composite material of the electrode olefins content is 25 wt.%, and finally the ultrasonic mixed. The mixed solution obtained is provided into a hydrothermal reactor, the water temperature of the reaction is adjusted to 100-250 degrees C for 2-24 hours, after the reaction product is cooled to room temperature, to be taken out, separated, washed stand, followed by adding dispersant and the surfactant formulated as 10-30% solids content of the slurry by spray pyrolysis, adjusting the spray pyrolysis inlet temperature to 180-250 degrees C, the outlet temperature to 80-l20 degrees C by spray pyrolysis to obtain finished product.