Which mechanism limits hydrogen fuel cell performance increase when raising operating temperature?

💡 Explanation

When operating temperature rises, fuel cell electrolyte membrane degradation accelerates due to increased thermal energy breaking down polymer bonds, leading to reduced proton conductivity and fuel crossover. Therefore membrane degradation limits performance, rather than improvements in kinetics or reduced catalyst poisoning, which are offset by material instability.

• Which outcome results from imperfections in multi-layer interference mirrors inside an extreme ultraviolet lithography system?
• Which consequence results when exceeding the gain medium's thermal limit in a fiber laser?
• Which outcome increases when photolysis of volatile organic compounds increases?
• Which outcome reduces contrast in optical coherence tomography (OCT)?
• Which consequence results when dielectric breakdown occurs in capacitive sensors?
• Which risk increases when a capacitor bank's discharge current rises rapidly?