Patent ID: 8257877

Claim:
A stack for a mixed reactant fuel cell, comprising: at least one membrane-electrode assembly comprising a polymer electrolyte membrane, an anode and a cathode disposed on opposite sides of the polymer electrolyte membrane, and an electrode substrate disposed on at least one of the anode or the cathode; and a plurality of oxidant supply paths extending through the at least one membrane-electrode assembly in a first direction and a plurality of fuel supply paths alternating with the oxidant supply paths, the oxidant supply paths and the fuel supply paths penetrating the at least one membrane-electrode assembly, wherein each oxidant supply path of the plurality of oxidant supply paths has openings at opposite ends of the oxidant supply path in the first direction, each of the openings being configured to supply oxidant to the at least one membrane-electrode assembly, and each fuel supply path of the plurality of fuel supply paths has one end open and the other end closed.