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Communication

The Impact of Chemical-Mechanical Ex Situ Aging on PFSA Membranes for Fuel Cells

Université de Lorraine, CNRS, LEMTA, F-54000 Nancy, France
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Author to whom correspondence should be addressed.
Academic Editor: V. María Barragán
Membranes 2021, 11(5), 366; https://doi.org/10.3390/membranes11050366
Received: 25 April 2021 / Revised: 12 May 2021 / Accepted: 13 May 2021 / Published: 18 May 2021
(This article belongs to the Special Issue Membranes for Energy Conversion)
A proton-exchange membrane fuel cell (PEMFC) constitutes today one of the preferred technologies to promote hydrogen-based alternative energies. However, the large-scale deployment of PEMFCs is still hampered by insufficient durability and reliability. In particular, the degradation of the polyelectrolyte membrane, caused by harsh mechanical and chemical stresses experienced during fuel cell operation, has been identified as one of the main factors restricting the PEMFC lifetime. An innovative chemical-mechanical ex situ aging device was developed to simultaneously expose the membrane to mechanical fatigue and an oxidizing environment (i.e., free radicals) in order to reproduce conditions close to those encountered in fuel cell systems. A cyclic compressive stress of 5 or 10 MPa was applied during several hours while a degrading solution (H2O2 or a Fenton solution) was circulated in contact with the membrane. The results demonstrated that both composite Nafion XL and non-reinforced Nafion NR211 membranes are significantly degraded by the conjoint mechanical and chemical stress exposure. The fluoride emission rate (FER) was generally slightly lower with XL than with NR211, which could be attributed to the degradation mitigation strategies developed for composite XL, except when the pressure level or the aging duration were increased, suggesting a limitation of the improved durability of XL. View Full-Text
Keywords: chemical degradation; durability; mechanical fatigue; Nafion membranes; PEM fuel cell chemical degradation; durability; mechanical fatigue; Nafion membranes; PEM fuel cell
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MDPI and ACS Style

Robert, M.; El Kaddouri, A.; Perrin, J.-C.; Mozet, K.; Dillet, J.; Morel, J.-Y.; Lottin, O. The Impact of Chemical-Mechanical Ex Situ Aging on PFSA Membranes for Fuel Cells. Membranes 2021, 11, 366. https://doi.org/10.3390/membranes11050366

AMA Style

Robert M, El Kaddouri A, Perrin J-C, Mozet K, Dillet J, Morel J-Y, Lottin O. The Impact of Chemical-Mechanical Ex Situ Aging on PFSA Membranes for Fuel Cells. Membranes. 2021; 11(5):366. https://doi.org/10.3390/membranes11050366

Chicago/Turabian Style

Robert, Mylène, Assma El Kaddouri, Jean-Christophe Perrin, Kévin Mozet, Jérôme Dillet, Jean-Yves Morel, and Olivier Lottin. 2021. "The Impact of Chemical-Mechanical Ex Situ Aging on PFSA Membranes for Fuel Cells" Membranes 11, no. 5: 366. https://doi.org/10.3390/membranes11050366

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