Metal air battery including a composite anode

A metal air battery, comprising:

• a composite anode comprising an anode core and a corrosion resistant coating coupled to a surface of the anode core, wherein the anode core comprises a first metal and the corrosion resistant coating comprises a second metal that is different from the first metal;
• a cathode configured to discharge a positive charge from the metal air battery;
• a deplating electrode configured to at least partially electropolish the corrosion resistant coating from the composite anode over two or more stages, wherein an initial portion of the corrosion resistant coating is removed during initial operation and one or more subsequent portions of the corrosion resistant coating are removed during one or more subsequent operations;
• an electrolyte in contact with the cathode, the composite anode, and the deplating electrode, wherein:
• the composite anode is adjacent to and electrically isolated from the deplating electrode;
• the corrosion resistant coating separates the electrolyte from the surface of the anode core;
• and
• removal of the corrosion resistant coating via the at least partial electropolish by the deplating electrode exposes at least a part of the surface of the anode core to allow the cathode to discharge the positive charge;
• and
• wherein the deplating electrode is configured to at least partially electropolish the corrosion resistant coating from the composite anode over two or more stages, wherein an initial portion of the corrosion resistant coating is removed during initial operation and one or more subsequent portions of the corrosion resistant coating are removed during one or more subsequent operations.

A metal air battery, comprising:

• a plurality of composite anodes, each of the plurality of composite anodes including an anode core and a corrosion resistant coating coupled to a surface of the anode core, wherein each anode core comprises a first metal and each corrosion resistant coating comprises a second metal that is different from the first metal;
• a cathode configured to discharge a positive charge from the metal air battery;
• one or more deplating electrodes configured to at least partially electropolish the corrosion resistant coating from one or more of the composite anodes over two or more stages, wherein an initial portion of the corrosion resistant coating is removed during initial operation and one or more subsequent portions of the corrosion resistant coating are removed during one or more subsequent operations;
• an electrolyte in contact with at least one of the cathode, the plurality of composite anodes, and the one or more deplating electrodes, wherein:
• the corrosion resistant coating separates the electrolyte from the surface of the anode core;
• and
• removal of the corrosion resistant coating via the at least partial electropolish by the one or more deplating electrode exposes at least a part of the surface of the anode core to allow the cathode to discharge the positive charge;
• and
• wherein the one or more deplating electrodes are configured to at least partially electropolish the corrosion resistant coating from one or more of the composite anodes over two or more stages, wherein an initial portion of the corrosion resistant coating is removed during initial operation and one or more subsequent portions of the corrosion resistant coating are removed during one or more subsequent operations.