Factors influencing ionomer degradation
Advances in Electrocatalysis, Materials, Diagnostics and Durability
Conductive membranes for low-temperature fuel cells
Published Online: 15 DEC 2010
Copyright © John Wiley & Sons, Ltd. All rights reserved.
Handbook of Fuel Cells
How to Cite
Inaba, M. and Yamada, H. 2010. Factors influencing ionomer degradation. Handbook of Fuel Cells. .
- Published Online: 15 DEC 2010
Chemical degradation of perfluorinated sulfonic acid (PFSA) membranes during operation is a serious problem to be overcome before commercialization of electric vehicles and stationary cogeneration systems based on polymer electrolyte fuel cells (PEFCs). In this article, the mechanism for peroxide/radical formation, which works as an active species for membrane degradation, in the cell is reviewed comprehensively. Accelerating factors, such as low humidification and open-circuit conditions, and the effect of air bleeding are also discussed. Finally, the chemistry of PFSA membrane degradation is outlined, together with recent improvements in the durability of PFSA membranes.
- perfluorinated sulfonic acid membranes;
- hydrogen peroxide;
- hydroxyl radicals;
- platinum band;
- gas crossover;
- open-circuit voltage;
- air bleeding