The present invention provides an aqueous electrolyte solution comprising at least four salts. The at least four salts are selected from: at least one salt selected from alkali metal chloride, alkali earth metal chloride, and ammonium chloride, or any combination thereof； at least one salt selected from alkali metal carbonate； alkali earth metal carbonate, and ammonium carbonate, or any combination thereof； at least one salt selected from alkali metal nitrate, alkali earth metal nitrate, and ammonium nitrate, or any combination thereof； and at least one salt selected from alkali metal phosphate, alkali earth metal phosphate, and ammonium phosphate, or any combination thereof.
