▎ 摘　　要

NOVELTY - Carbon nanotube composite electrode material having a layer-by-layer wrapping structure, is claimed. The innermost layer of electrode material is oriented by carbon nanotubes, and the ferroferric oxide nanoparticles are arranged along the axial direction of the carbon nanotubes on the surface of the carbon nanotubes. The surface of the ferroferric oxide particles is coated with a polyaniline layer, so as to form a dendritic structure to communicate with the adjacent ferroferric oxide particles. The surface of the polyaniline layer is covered with a graphene layer as the outermost layer of the carbon nanotube composite electrode material. USE - The electrode material is useful in the field of supercapacitor (claimed). ADVANTAGE - The material: has high power density, high energy density, long cycle service life and excellent application prospect in the super capacitor field. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the carbon nanotube composite electrode material, comprising (i) mixing carbon nanotube film with soluble iron salt, and using the hydrothermal method to make the generated ferroferric oxide nanoparticles grow on the surface of the carbon nanotubes to obtain the ferroferric oxide/carbon nanotube film, (ii) placing the ferroferric oxide/carbon nanotube film into an aniline solution, electrifying for electrodeposition, growing polyaniline on the surface of the ferroferric oxide/carbon nanotube film, and obtaining ferroferric oxide/carbon nanotube/polyaniline film, and (iii) placing the carbon nanotube/ferroferric oxide/polyaniline film into the graphene oxide solution, performing electrophoresis self-assembly treatment, and depositing graphene on the surface of the carbon nanotube/ferroferric oxide/polyaniline film to obtain the finished product; (2) an electrode comprising the carbon nanotube composite electrode material, where the carbon nanotube composite electrode material is prepared by the above mentioned method; and (3) a super capacitor, comprising electrode.