Preparation method and application of inorganic colloidal electrolyte of aqueous zinc ion battery

The invention discloses a preparation method and application of an inorganic colloidal electrolyte of an aqueous zinc ion battery. The method comprises the following steps of 1) immersing hydroxyl calcium phosphate into a zinc salt solution, carrying out ion exchange treatment, filtering and drying to obtain inorganic powder after the treatment is finished, and 2) grinding the inorganic powder, mixing the ground inorganic powder with a conventional liquid electrolyte, uniformly mixing, and pressing into a sheet with a set thickness to obtain the inorganic colloidal electrolyte. Calcium ions and zinc ions in hydroxyl calcium phosphate are subjected to ion exchange to obtain inorganic matter in a mixed form of hydroxyl zinc phosphate and hydroxyl calcium phosphate; the colloidal electrolytecan be obtained only by mixing with a small amount of conventional liquid electrolyte and then pressing; a role of positive and negative electrode isolation is plated; the active water amount is reduced; alleviation of the wa