▎ 摘　　要

NOVELTY - The method for preparing six-membered cyclic cobalt oxyhydroxide/graphene nanocomposites, involves (1) preparing cobalt salt and graphene aqueous solution, (2) uniformly mixing the cobalt salt aqueous solution and graphene aqueous solution, stirring under nitrogen atmosphere or inert gas at room temperature for 0.5-5 hours, (3) adding strong aqueous alkali solution, reacting at 30-80 degrees C for 0.5-5 hours, (4) removing nitrogen or inert gas, adding 2-10 %mass strong oxidizing agent, aging for 0.5-5 hours, (5) filtering the suspension, washing and drying to obtain final product. The cobalt salt aqueous solution contains cobalt ion with molar concentration of 0.001-0.1 mol/L, and the graphene aqueous solution contains graphene with mass concentration of 0.1-2 mg/mL. The strong alkaline aqueous solution contains hydroxide ion with molar concentration of 0.01-1.0 mol/L. USE - Method for preparing six-membered cyclic cobalt oxyhydroxide/graphene nanocomposites for use in supercapacitor, lithium ion battery and catalytic application. ADVANTAGE - The method enables simple and large-scale preparation of six-membered cyclic cobalt oxyhydroxide/graphene nanocomposites with controllable morphology, under mild reaction condition.