▎ 摘　　要

NOVELTY - Preparing cobalt-zinc-metal-organic framework/nickel cobaltite-doped carbon nanotubes/reduced graphene oxide composite electrode material involves: (1) mixing carbon nanotubes (CNTs) and graphene oxide (GO) dispersion, stirring, vacuum filtering to obtain CNTs/GO film, adding cobalt(II) nitrate hexahydrate, nickel(II) nitrate hexahydrate, urea and ammonium fluoride to deionized water, mixing to prepare a mixed solution, soaking CNTs/GO film in the solution, heat-preserving, cooling, washing, and drying to obtain nickel cobaltite-doped CNTs/reduced GO composite film; (2) preparing cobalt(II) nitrate hexahydrate, zinc nitrate hexahydrate and 2-methylimidazole solution, ultrasonically dissolving, mixing and stirring to obtain cobalt-zinc-metal-organic framework (MOF) suspension, immersing the composite film in the suspension to obtain a cobalt-zinc-MOF/nickel cobaltite-doped CNTs/reduced GO composite electrode material; and (3) annealing the obtained material. USE - The method is useful for preparing cobalt-zinc-metal-organic framework/nickel cobaltite doped carbon nanotubes/reduced graphene oxide composite electrode material used as supercapacitor material (all claimed) for supercapacitor and lithium-ion battery. ADVANTAGE - The method provides composite electrode material, which has enhanced flexibility and overall conductivity, avoids the use of binder, and maximizes the specific surface area of the membrane, which is beneficial to the conduction of electrons and the transport of ions in solution. DETAILED DESCRIPTION - Preparing cobalt-zinc-metal-organic framework/nickel cobaltite-doped carbon nanotubes/reduced graphene oxide composite electrode material involves: (1) evenly mixing carbon nanotubes (CNTs) and graphene oxide (GO) dispersion, stirring, vacuum filtering to obtain CNTs/GO film, adding cobalt(II) nitrate hexahydrate, nickel(II) nitrate hexahydrate, urea and ammonium fluoride in a mass ratio of (0.5-0.7):(0.2-0.5):(0.2-0.4):(0.05-0.08) to deionized water, evenly mixing and stirring at room temperature to prepare a mixed solution, transferring to a reaction kettle, soaking the CNTs/GO film in the solution, heat-preserving at 110degrees Celsius for 4 hours, naturally cooling to room temperature, taking out, alternately washing with deionized water and ethanol, and drying to obtain nickel cobaltite-doped CNTs/reduced GO composite film; (2) preparing cobalt(II) nitrate hexahydrate, zinc nitrate hexahydrate and 0.39-0.45 mol/L 2-methylimidazole solution, fully ultrasonically dissolving, evenly mixing and stirring to obtain cobalt-zinc-metal-organic framework (MOF) suspension, immersing the composite film in the suspension for 0.5-6 hours to obtain a cobalt-zinc-MOF/nickel cobaltite-doped CNTs/reduced GO composite electrode material; and (3) annealing the obtained composite electrode material at 350degrees Celsius for 2 hours. The molar concentration ratio of urea and ammonium fluoride is (0.20-0.30):(0.05-0.08). The mass ratio of cobalt(II) nitrate hexahydrate and zinc nitrate hexahydrate is (0.5-0.7):(0.3-0.5). INDEPENDENT CLAIMS are included for the following: (1) the cobalt-zinc-metal-organic framework/nickel cobaltite doped carbon nanotubes/reduced graphene oxide composite electrode material; and (2) use of cobalt-zinc-metal-organic framework/nickel cobaltite doped carbon nanotubes/reduced graphene oxide composite electrode material as supercapacitor material.