▎ 摘　　要

NOVELTY - Preparing cathode active material comprises obtaining raw material components, including vanadium source and sulfur source, dissolving raw material components in a solvent, and carrying out hydrothermal reaction to obtain a vanadium tetrasulfide cathode active material. USE - The active material is useful for a zinc ion battery. ADVANTAGE - The method is simple and easy to operate. The prepared nano tetrasulfide vanadium cathode active material provides a large amount of active sites for zinc ion embedding and removing zinc ions, improving zinc ion mobility, reducing the growth of zinc dendrite, so as to improve the circulation cathode material. At the same time, the potential of the nanometer vanadium tetra-sulfide material cathode relatively low, it is used as the material anode zinc ion anode with high matching degree, the lower potential can better keep the stability of the structure of the material, to further improve the cycle performance of material. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: cathode of a zinc ion battery; and zinc ion battery, comprising the zinc ion battery cathode.