Abstract
AbstractA test method is proposed for obtaining correct polarization curves of PEFC single cells with reference electrodes, which in principle should have identical anode polarization curves for both H2/O2 and H2/Air. Measured anode polarization curves are usually linear to the current density but not ohmic. Leak current between cathode and reference electrode causes voltage shift on the anode polarization curve. In order to obtain the ohmic anode polarization, the measured anode polarization curve should be moved vertically up to overlap with the base point. Configuration of the electrode edge adjacent to the reference electrode gives a significant effect on the anode and cathode potential. Polarization of an electrode which is 0.5 mm nearer to the reference electrode than the other electrode does not include the ohmic loss of the membrane. Instead, polarization of the other electrode includes the ohmic loss of the membrane. © 2010 Wiley Periodicals, Inc. Electr Eng Jpn, 172(1): 10–18, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20979
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