FUEL CELLS – PROTON-EXCHANGE MEMBRANE FUEL CELLS | Membrane: Life-Limiting Considerations

An overview of the state of the art related to membrane durability for proton-exchange membrane fuel cells (PEMFCs) is presented. In particular, we discuss (1) causes of membrane failure in PEMFCs; (2) degradation reactions of perfluorosulfonic acid (PFSA) membranes as revealed by exposure of model compounds to peroxide in the presence of active metals and ultraviolet irradiation; and (3) currently emerging mitigation methods. We close with some brief comments on future prospects, notably the need for similar mechanistic elucidation of non-PFSA membranes.