▎ 摘　　要

NOVELTY - Preparing three-dimensional zinc cathode involves adding rheology modifier, active substance and doped source small molecule into solvent, mixing uniformly to obtain printing ink, printing ink three-dimensional obtained is printed on collector, orderly cooling and freezing and drying to obtain three-dimensional matrix, annealing the three-dimensional substrate in the nitrogen atmosphere to obtain a three-dimensional current collector, and depositing the three-dimensional current collector in the deposition liquid for constant current deposition to obtain the three-dimensional printing zinc cathode. USE - Preparation method of three-dimensional printing three-dimensional zinc cathode is used in high-safety large-scale energy storage system i.e. zinc ion battery. ADVANTAGE - The method has simple process, adjustable structure, light weight and so on, which effectively solves the problem that the specific surface area is small, too large pore, structure is not controllable and the mechanical property is limited. The method uses the combination method of the three-dimensional printing and the in-situ doping to the macroscopic appearance of the three-dimensional framework, component and surface properties for efficient control. The three-dimensional current collector prepared by the method can be uniform local current density and shorten the ion diffusion distance, can effectively inhibit the growth of zinc negative dendritic crystal, and obtains the dendrite crystal zinc cathode, so as to greatly improve the zinc ion battery safety and cycle stability performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a three-dimensional zinc cathode, is prepared as mentioned above.