Abstract
Proton exchange membrane (PEM) fuel cell operated at temperatures above 80 °C provides many benefits including enhance oxygen reduction reaction kinetics, water management and effective heat removal. However, the state-of-the-art Nafion-based electrode (NBE) employed in this device is susceptible to performance loss due to poor hydration and electrode deterioration. These issues offset the benefits of operating the PEM fuel cell at higher temperatures. A sulfonated silica-ceramic carbon electrode (SS-CCE) has been synthesized and tested using various electrochemical tools to assess their viability for cell temperatures ranging from 70 °C to 95 °C. It was found that the SS-CCE cathode catalyst layer maintained stable performance above 80 °C while the NBE cathode declined in performance. In addition, after an accelerated stress test, we observed 15% performance loss for the SS-CCE cathode compared to 40% of the NBE cathode.
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