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In this work, seven commercially available high temperature (HT) membrane electrode assemblies (MEAs), using a phosphoric acid doped polybenzimidazole (PBI) membrane, were tested at six constant current densities during mostly around 540 h: 1, 0.6, 0.4, 0.2, 0.1, and 0 A cm−2. The MEA aged at 0.6 A cm−2 appears to be the less degraded one and the MEAs working at 0 and 1 A cm−2 seem to be the most...
The degradation of the catalyst layer represents one of the main limiting factors in a wider adoption of fuel cells. The identification of the contributions of different mechanisms of catalyst degradation, namely the Ostwald ripening and particle agglomeration, is an important step in the development of mitigation strategies for increasing fuel cell reliability and prolonging its life time.
In this...
Two‐dimensional (2D) distribution of proton exchange membrane (PEM) fuel cell cathode overpotential η in the vicinity of parabolic anode tip is described by nonlinear Poisson–Boltzmann equation. The 2d shape of η is calculated numerically for the anode tip curvature varying by two orders of magnitude. It is shown that the reference electrode for measuring cathode overpotential can be located at a...
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