| http://www.w3.org/ns/prov#value | - The cells within the stack are sequentially arranged, each including a cathode, a proton exchange membrane, and an anode. [0005] Membrane electrode assemblies (???MEAs???) for use in fuel cells are well known, being described for example in U.S. Pat. Nos. 5,272,017 and 3,134,697, which are incorporated by reference herein.
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