Open Circuit Voltage Fuel Cell Durability Testing Using Multiple PEM MEAs

This chapter reports the novel use of multiple membrane layers used to fabricate PEM MEAs in order to gain an understanding of the degradation mechanisms ongoing in an operating fuel cell. Open circuit voltage conditions were used for this accelerated durability experiment. The role of catalyst surface area on the degradation rate is examined using a variety catalyst support systems. The prescense of platinum in the membrane, its location, and the relation of that location to where the predominance of degradation is occurring is discussed. In addition we will examine the effects of using a peroxide mitigating agents on reduction of fluoride release rate and improved lifetimes.