Effect of pinhole location on degradation in polymer electrolyte fuel cells

摘要: Abstract This work analyses the impact of location pinholes in polymer electrolyte fuel cells on degradation electrodes. Defects with a diameter 0.45 mm were created 25 cm 2 membrane electrode assembly (MEA) cell. The MEA was operated and characterised using segmented single effects measured evaluated. affected cell behaviour during periods hydrogen starvation, thus accelerating process carbon support as well loss active platinum catalyst surface area. Furthermore, induced performance decay determined. Pinholes close to anode inlet general have shown more severe effect operation parameters, such open circuit voltage, performance, resistance crossover, than at any other locations. Also, accelerated. These mainly due locally increased temperatures.