▎ 摘　　要

NOVELTY - Preparation of a nickel-based three-dimensional ordered titanium dioxide/graphene composite material involves: 1) forming a three-dimensional ordered polystyrene microsphere close-packed structure in a three-dimensional nano microsphere self-assembly mode; 2) forming a nickel-based three-dimensional ordered mesoporous structure. USE - The method is used for preparing nickel-based three-dimensional composite material for cathode of lithium-ion batteries (all claimed) in the fields of composite materials and fine chemical engineering. ADVANTAGE - The prepared nickel-based three-dimensional ordered titanium dioxide/graphene composite material has improved conductivity. The nickel-based three-dimensional ordered mesoporous structures connected with each other, have high specific surface area and good conductivity and stability. The increase in the charge storage density/ unit area of the composite material, enhances the specific capacity, rate capability and energy density of lithium-ion battery. The synergistic electrochemical performance of titanium dioxide and reduced graphene oxide contained in the material, improves the electrochemical performance of the composite electrode. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. nickel-based three-dimensional ordered titanium dioxide/graphene composite material which sequentially comprises a substrate made of nickel metal, an intermediate layer deposited by titanium dioxide and a top layer sprayed by reduced graphene oxide from top to bottom. 2. use of nickel-based three-dimensional ordered titanium dioxide/graphene composite material in cathode materials of lithium ion batteries. 3. lithium ion battery comprising the cathode made of nickel-based three-dimensional ordered titanium dioxide/graphene composite material. The lithium- ion battery contains anode made of a lithium metal sheet and electrolyte comprising lithium hexafluorophosphate. The diaphragm of the lithium ion battery is a polypropylene film. DESCRIPTION OF DRAWING(S) - The drawing shows schematic diagram of the morphology of microstructure of nickel-based three-dimensional mesoporous structure.