Patent ID: 7238448

Claim:
A method for making an air recovery battery, the method comprising: (a) combining MnO 2 , carbon, a binder, and a solvent to form a cathode paste, wherein the MnO 2 consists essentially of electrochemically synthesized MnO 2 , and wherein the cathode paste contains at least about 60% by total weight MnO 2 , wherein the total weight is calculated as the combined weight of the manganese dioxide, the carbon, the binder, and any other additives that optionally are included in the paste; (b) spreading the cathode paste on a current collector and removing the solvent to form a cathode; (c) inserting the cathode into a container, wherein the container includes an air access port and air entering the air access port can contact the cathode; (d) inserting anode material into the container, wherein the anode material comprises zinc; and (e) sealing the container to provide the air recovery battery, wherein the cathode is the only cathode included in the air recovery battery.