ZINC ION SECONDARY BATTERY INCLUDING AQUEOUS ELECTROLYTE

Disclosed is a zinc ion secondary battery including an aqueous electrolyte. More particularly, the zinc ion secondary battery includes a positive electrode comprising a positive electrode active material; a negative electrode comprising a negative electrode active material; and an aqueous electrolyte disposed between the positive electrode and the negative electrode and containing an aqueous solvent and a metal salt, wherein the metal salt has a composition represented by Formula 1 below: A-Zn.M [Formula 1] wherein A is an aminopolycarboxylate, x is 1 to 2, y is 0 to 3, and M is an alkali metal.