NOVELTY - Oxidant reduction electrode module (10) for immersion into an ionically conductive medium of an electrochemical cell, comprises: a housing (30) configured to define a gaseous oxidant receiving space in it; an oxidant reduction electrode (20) having an oxidant facing side and an ionically conductive medium facing side (40); a gaseous oxidant inlet and a gaseous oxidant outlet coupled by a gaseous oxidant channel extending through the gaseous oxidant receiving space; and at least one support member positioned within the gaseous oxidant receiving space.    USE - The oxidant reduction electrode module is useful in the ionically conductive medium of electrochemical cell.    ADVANTAGE - The oxidant reduction electrode module: utilizes the support members, which prevent deformation of oxidant reduction electrode into gaseous oxidant receiving space when the oxidant reduction electrode is immersed into the ionically conductive medium (claimed); and prevents or minimizes the influence of shunt current between fluidly connected cell assemblies.    DETAILED DESCRIPTION - Oxidant reduction electrode module (10) for immersion into an ionically conductive medium of an electrochemical cell, comprises: a housing (30) configured to define a gaseous oxidant receiving space in it; an oxidant reduction electrode (20) having an oxidant facing side and an ionically conductive medium facing side (40), where the oxidant reduction electrode is mounted to the housing so that the oxidant reduction electrode defines a boundary wall for the gaseous oxidant receiving space, the oxidant facing side faces inwardly to the gaseous oxidant receiving space and the ionically conductive medium facing side faces outwardly for exposure to the ionically conductive medium; a gaseous oxidant inlet and a gaseous oxidant outlet coupled by a gaseous oxidant channel extending through the gaseous oxidant receiving space; and at least one support member positioned within the gaseous oxidant receiving space, and configured to prevent deformation of the oxidant reduction electrode into the gaseous oxidant receiving space when the oxidant reduction electrode is immersed into the ionically conductive medium and to direct a flow of gaseous oxidant within the gaseous oxidant channel from the gaseous oxidant inlet to the gaseous oxidant outlet, where an oxidant is allowed into the gaseous oxidant receiving space via the gaseous oxidant inlet, and the oxidant reduction electrode is configured to absorb the gaseous oxidant via the oxidant facing side and to reduce the gaseous oxidant during discharge of the electrochemical cell. INDEPENDENT CLAIMS are also included for:    (1) an assembly comprising the oxidant reduction electrode module coupled to a fuel electrode module containing a fuel electrode, where the assembly is configured to space the oxidant reduction electrode from the fuel electrode, so that, when immersed into the ionically conductive medium, the ionically conductive medium facing side of the oxidant reduction electrode and a metal fuel of the fuel electrode are exposed to the ionically conductive medium for electrochemically oxidizing the metal fuel;    (2) an electrochemical cell system comprising: a chamber configured to contain a quantity of ionically conductive medium in it; at least one fuel electrode, each comprising a metal fuel and configured to be contacted by the ionically conductive medium; and at least one oxidant reduction electrode module immersed into the ionically conductive medium, where at least one electrochemical cell is defined by each fuel electrode and at least one associated oxidant reduction electrode, and each of the electrochemical cells is configured to (during discharge) oxidize the metal fuel at the fuel electrode and reduce the gaseous oxidant at the associated oxidant reduction electrode to generate a discharge potential difference between them for application to a load;    (3) assembling the oxidant reduction electrode module configured for immersion into the ionically conductive medium of the electrochemical cell, comprising: providing the housing coupled to the gaseous oxidant inlet and gaseous oxidant outlet; providing the support members within the gaseous oxidant space, where the support members are configured to form the gaseous oxidant channel to direct a flow of gaseous oxidant between the gaseous oxidant inlet and outlet; and sealing the oxidant reduction electrode to the housing, so that the oxidant facing side of the oxidant reduction electrode faces inwardly into the gaseous oxidant space and defines a boundary wall for the gaseous oxidant space, and an ionically conductive medium facing side faces outwardly for exposure to the ionically conductive medium when the oxidant reduction electrode module is immersed in it, and the assembly of the housing and the oxidant reduction electrode prevents flow of the ionically conductive medium into the gaseous oxidant space, where the gaseous oxidant inlet permits the flow of gaseous oxidant into the gaseous oxidant space; and    (4) assembling the electrochemical cell, comprising: providing the chamber; immersing the immersible oxidant reduction electrode module (configured to maintain a gaseous oxidant space bounded by the housing and an oxidant facing side of oxidant reduction electrode, where the gaseous oxidant space coupled to a gaseous oxidant inlet and gaseous oxidant outlet) and the fuel electrode within the quantity of ionically conductive medium; and receiving gaseous oxidant into the gaseous oxidant space via the gaseous oxidant inlet, where the ionically conductive medium facing side of the oxidant reduction electrode faces the fuel electrode and is exposed to the ionically conductive medium, so that the ionically conductive medium may conduct ions between the fuel and oxidant reduction electrodes to support electrochemical reactions at the fuel and oxidant reduction electrodes.    DESCRIPTION OF DRAWING(S) - The figure shows a front perspective view of the oxidant reduction electrode module.    Oxidant reduction electrode module (10)    Oxidant reduction electrode (20)    Housing (30)    Ionically conductive medium facing side (40)    Top portion of housing (60)