Title: Proton-exchange-membrane Fuel Cells Durability Evaluated by Load-On/Off Cycling
Citation: JOURNAL OF POWER SOURCES vol. 191 no. 2 p. 501-509
Publication Year: 2009
JRC N°: JRC46123
ISSN: 0378-7753
URI: http://www.elsevier.com/locate/jpowsour
DOI: 10.1016/j.jpowsour.2009.02.027
Type: Articles in periodicals and books
Abstract: Load-on/off cycles at 80 ¿C, with near-saturated H2 and air at ambient pressure were applied to investigate the durability of several types of membrane-electrode-assemblies (MEAs) for protonexchange-membrane fuel cells (PEMFC). The ohmic resistance, H2 cross-over, electrochemically active surface area (ECSA), protonic resistance of the cathode aswell as the performances with H2/air and H2/O2 were measured at regular intervals. These data enabled a breakdown of the increase in cell voltage losses upon cycling. Increase of kinetic losseswas found in all MEAs but significant differenceswere obtained for the transport losses in the cathode catalyst layer, which either had a small or a substantial contribution to the overall voltage decay, depending on the carbon type and ionomer loading. Membrane degradation did not contribute significantly in these tests.
JRC Directorate:Energy, Transport and Climate

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