Preparation method of magnesium-doped V3O7H2O electrode material and application of magnesium-doped V3O7H2O electrode material in aqueous zinc ion battery

The invention belongs to the technical field of materials, and particularly relates to a preparation method of a magnesium-doped V3O7.H2O electrode material and application of the magnesium-doped V3O7.H2O electrode material to an aqueous zinc ion battery. The preparation method comprises the following steps: dissolving V2O5 in deionized water, adding polyethylene glycol-400 and H2O2, stirring at room temperature, carrying out a hydrothermal reaction to obtain a positive electrode material vanadium oxide, adding magnesium carbonate, and carrying out a secondary hydrothermal reaction to obtain the Mg-doped vanadium oxide MgxV3O7.H2O. According to the material, V3O7.H2O is prepared through a simple one-step hydrothermal method, metal magnesium ions are doped in the electrode material through secondary hydrothermal further reaction, and the magnesium ions are doped in the V3O7.H2O, so that the interlayer spacing of the V3O7.H2O is enlarged, ion diffusion and charge transfer are effectively promoted, the conductiv