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The performance of a ten-cell 50 cm2 100 W polymer electrolyte membrane fuel cell (PEMFC) stack was evaluated under dynamic load cycling conditions utilizing the 2005 United States Department of Energy durability test protocol for PEFCs. An enhancement of performance was observed during the first 240 h, while an irreversible degradation of stack performance was observed after 480 h (∼4700 cycles)...
A composite membrane operated in polymer electrolyte fuel cells (PEFCs) under low relative humidity (RH) is developed by incorporating cerium oxide nanotubes (CeNT) into a perfluorosulfonic acid (Nafion®) membrane. Porous CeNT is synthesized by direct heating a precursor impregnated polymer fibers at 500 °C under an air atmosphere. Compared to recast Nafion and commercial Nafion (NRE-212) membranes,...
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