Abstract: An improved electrochemical cell having circular anodes, cathodes, and electrolyte reservoirs; semicircular separators and gas flow spaces, is constructed such that approximately one-half of each of the two major faces of each cathode is adjacent to separator material, and the other half of each major face is adjacent to a gas flow space such that the area on each cathode major face adjacent to separator material is opposite (through the cathode) the area of the other major face which is adjacent to a gas flow space. Approximately one-half of each of the two major faces of each anode is also positioned adjacent to separator material and the other half of each major anode face is adjacent to a gas flow space. In the fabricated stack each separator has an adjacent anode face and an adjacent cathode face opposite each other across the separator. Electrolyte reservoirs are positioned adjacent anodes at the top and bottom ends of the stack.

Abstract: The structure of a cell for a metal-gas battery is disclosed in which the cell components comprising the electrodes, separators, and electrolyte reservoirs are substantially planar structures, circular in shape and having a hole at the center. These components are stacked on a common axis perpendicular to their planar surfaces to form individual electrochemical cells. Individual cells may be similarly stacked to form a battery. The stack of flat ring-shaped components comprising a cell is enclosed in a plastic insulating cell case member providing a reactant gas manifold space at the inner circumference of the cell stack components inside the plastic enclosure. On the inner circumference of the plastic cell case member are positioned ports covered with a non-wetting porous plastic membrane of Teflon.