A current producing cell has anode flow plates 22 and cathode flow plates 20. Each of the flow plates 20, 22 defines a membrane face 26, a collector face 24, and a center axis C perpendicular to the membrane face 26 and the collector face 24. Each of the collector faces 24 define a plurality of cooling channels 74, 76, 78 and a plurality of transport channels 62, 64. The cooling channels 74, 76, 78 of the cathode flow plates 20 extend radially relative to the center axis C thereof to overlap the transport channels 62, 64 of the anode flow plates 22. The cooling channels 74, 76, 78 of the anode flow plates 22 extend radially relative to the center axis C thereof to overlap the transport channels 62, 64 of the cathode flow plates 20 for providing cooling axially between the cooling channels 74, 76, 78 of the anode flow plate 22 to the transport channels 62, 64 of the cathode flow plate 20 and between the cooling channels 74, 76, 78 of the cathode flow plate 20 to the transport channels 62, 64 of the anode flow plate 22.