ABSTRACT
PFSA-based membranes exhibit good proton conductivity, chemical and mechanical stability, as well as high tear resistance and low gas permeability under the normal fuel cell operating conditions. However, a number of technical challenges are associated with this particular membrane type when used in fuel cells. Primarily, these include the high cost of the ionomer and especially the noble metal-based electrode materials. In addition, the narrow range of operational temperatures makes the thermal and water management critical. High purity of the fuel is required because of the risk of poisoning of the platinum electrocatalysts, especially by carbon monoxide, which is a by-product of hydrogen production via reforming of carbon-containing fuels.
