▎ 摘　　要

NOVELTY - A nickel cobaltite/nitrogen-doped graphene composite material preparing method involves dissolving cobalt chloride hexahydrate, nickel chloride hexahydrate and urea in deionized water, stirring the mixture uniformly, forming a solution having an atomic molar ratio of cobalt to nickel of 1:1.5-1:2.5. A graphene oxide is added to ethanol to obtain a graphene oxide dispersion, where the content of graphene oxide is 0.5-1 mg/mL and dosage of graphene oxide is 25 mg graphene oxide/1 mmol of nickel chloride hexahydrate. The obtained solution is added to the graphene oxide dispersion, ammonia water is added to bring the pH to 10 and stirred to obtain a precursor suspension. The precursor suspension is transferred to an autoclave for hydrothermal reaction at 120-180 degrees C for 6-12 hours and cooled to room temperature to obtain a reaction liquid. The obtained reaction liquid is washed with water and ethanol, and lyophilized to obtain the finished product. USE - Method for preparing a nickel cobaltite/nitrogen-doped graphene composite material for supercapacitor electrode material (claimed). ADVANTAGE - The method enables preparing the nickel cobaltite/nitrogen-doped graphene composite material with uniform particle size and better electrochemical performance in one-step, and simple manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a supercapacitor electrode material.