Patent ID: 7005209

Claim:
A fuel cell stack comprising: (a) a first end plate and a second end plate, the second end plate being aligned with the first end plate; (b) a plurality of fuel cells interposed between the first and second end plates, at least one of the fuel cells comprising: (i) a cantilevered unitized MEA assembly, the cantilevered unitized MEA assembly comprising an MEA and a frame, the MEA being sealed within the frame, (ii) an anode flow field, (iii) a cathode flow field, and (iv) wherein the anode flow field comprises a primary flow field and a mating flow field, wherein the primary flow field includes a plurality of valleys and the mating flow field includes a plurality of recessed areas corresponding to respective ones of the valleys to form a plurality of microchannels; (c) a plurality of internal foils, each internal foil having an first connection surface and a second connection surface; and (d) a compression means, the compression means securing the end plates, the plurality of fuel cells, and the plurality of internal foils to form the fuel cell stack.