Metal-air battery and protected lithium electrode used therein

Abstract

A metal-air battery and a protected anode used therein, which make it possible to prevent the metal such as Li being an anode active material and formed into fine powder from dispersing away from the anode layer, and to improve charging and discharging cycle characteristics, even in the case of a charging and discharging cycle over a long period of time. For example, a protected anodeincludes an anode current collector; an anode layerwhich is stacked on an air electrode side of the anode current collector and which includes a metal being an anode active material of a metal-air battery; a first separatorwhich is stacked on the air electrode side of the anode layer and which includes multiple pores permeable to ions of the metal and an organic electrolytic liquid; and a second separatorwhich is provided on the air electrode side of the first separator so as to be movable relative to the first separator in an inter-electrode direction and which includes multiple pores permeable to the metal ions and the organic electrolytic liquid. In addition, the protected anode may be used to fabricate a metal-air battery.