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• W4280490895 abstract "High temperature proton exchange membrane fuel cells (HT-PEM) offer significant advantages over conventional low temperature fuel cells (LT-PEM), including improved fuel impurity tolerance and increased electrode kinetics. These advantages enable use of reformate fuels with potentially lower costs and simplified handling versus ultra-pure hydrogen fuel required for LT-PEM. Although HT-PEM fuel cell operation has been demonstrated at temperatures above 120 °C, relatively few studies have focused on operation at 200 °C or higher where fuel impurity tolerance is maximized, but at the cost of accelerated performance degradation. To help address this research gap, the present study investigated the voltage degradation of HT-PEM fuel cells operating at 200 °C and 0.4 A/cm 2 under continuous load conditions, and at 200 °C and 0.6 A/cm 2 during start-stop cycling. Results based on triplicate measurements show an average constant load degradation rate of 102 μV/h, as compared to literature values of 10 μV/h or less at lower temperature and current density. The start-stop experiments showed relatively high degradation rates per cycle up to 50 cycles, with decreasing average degradation rates over 80 and 100 cycles. • HT-PEM offers tolerance to fuel impurities at high temp, but durability suffers. • Data at 200C needed to understand performance vs. durability with reformate fuels. • Mean voltage degradation rate with pure H 2 at 0.4 A/cm 2 was 102 μV/h. • High start-stop voltage loss over 50 cycles, lower loss over 100 cycles. • Data provide a baseline for testing integrated HT-PEM & reformer systems." @default.
• W4280490895 created "2022-05-22" @default.
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• W4280490895 date "2022-05-01" @default.
• W4280490895 modified "2023-10-14" @default.
• W4280490895 title "Voltage degradation of high-temperature PEM fuel cells operating at 200 °C under constant load and start-stop conditions" @default.
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• W4280490895 doi "https://doi.org/10.1016/j.ijhydene.2022.04.067" @default.
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