Effect of dynamic operation on chemical degradation of a polymer electrolyte membrane fuel cell

▶ The frequency effect of the dynamic operation on the chemical degradation is investigated. ▶ The fluoride release rate in terms of the frequency change during the cyclic operation is evaluated. ▶ Two possibilities of the accelerating factor of the dynamic operation on the chemical degradation are presented. ▶ One is the stress induced by cyclic humidity, and the other is periodic transport of H2O2 inside the membrane.