Abstract
The objective of this paper is to determine the effect of accelerated start-stop cycling protocol on a high temperature polymer electrolyte membrane fuel cell performance under operating temperature of 160 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$^{\circ}\mathbf{C}$</tex> and current density of 0.4 A cm-2. The degradation rates during 200 start-stop cycles are analysed and discussed. The results are supported by polarization curves and electrochemical impedance spectroscopy. The overall degradation over 200 start-stop cycles is -49 mV and the average degradation rate per one cycle is -0.25 mV.
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