High voltage rechargeable Zn—MnO2 battery

A rechargeable Zn—MnO2 battery, wherein a structure of the Zn—MnO2 battery comprises

• a zinc electrode;
• an alkaline electrolyte comprising an alkaline liquid electrolyte, wherein the alkaline liquid electrolyte comprises a concentration of an alkali metal hydroxide from 200 g/L to 600 g/L;
• an acid electrolyte comprising an acidic liquid electrolyte, wherein the acidic liquid electrolyte comprises an acid concentration of 50 g/L-300 g/L, and the acidic liquid electrolyte is an aqueous solution of 50 g/L-100 g/L sulfuric acid and 150 g/L-200 g/L manganese sulfate;
• an ion exchange membrane, added between the acid electrolyte and the alkaline electrolyte to limit the contact between hydrogen ions and hydroxyl ions, thereby ensuring a normal operation of the rechargeable Zn—MnO2 battery;
• and
• a MnO2 electrode in which MnO2 powder is mixed with a conductive agent and an additive, thus achieving an open circuit voltage greater than 2.45V.