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Article

Design Strategies for Alkaline Exchange Membrane–Electrode Assemblies: Optimization for Fuel Cells and Electrolyzers

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Hydrolite Ltd., 2 Hatochen St., Caesaria 38900, Israel
2
Department of Chemistry, Bar Ilan Institute of Technology and Advanced Materials (BINA), Bar Ilan University, Ramat Gan 52900, Israel
*
Authors to whom correspondence should be addressed.
Academic Editor: Dirk Henkensmeier
Membranes 2021, 11(9), 686; https://doi.org/10.3390/membranes11090686
Received: 1 July 2021 / Revised: 22 August 2021 / Accepted: 28 August 2021 / Published: 3 September 2021
Production of hydrocarbon-based, alkaline exchange, membrane–electrode assemblies (MEA’s) for fuel cells and electrolyzers is examined via catalyst-coated membrane (CCM) and gas-diffusion electrode (GDE) fabrication routes. The inability effectively to hot-press hydrocarbon-based ion-exchange polymers (ionomers) risks performance limitations due to poor interfacial contact, especially between GDE and membrane. The addition of an ionomeric interlayer is shown greatly to improve the intimacy of contact between GDE and membrane, as determined by ex situ through-plane MEA impedance measurements, indicated by a strong decrease in the frequency of the high-frequency zero phase angle of the complex impedance, and confirmed in situ with device performance tests. The best interfacial contact is achieved with CCM’s, with the contact impedance decreasing, and device performance increasing, in the order GDE >> GDE+Interlayer > CCM. The GDE+interlayer fabrication approach is further examined with respect to hydrogen crossover and alkaline membrane electrolyzer cell performance. An interlayer strongly reduces the rate of hydrogen crossover without strongly decreasing electrolyzer performance, while crosslinking the ionomeric layer further reduces the crossover rate though also limiting device performance. The approach can be applied and built upon to improve the design and production of alkaline, and more generally, hydrocarbon-based MEA’s and exchange membrane devices. View Full-Text
Keywords: alkaline exchange membranes; fuel cells; electrolyzers; membrane–electrode assembly alkaline exchange membranes; fuel cells; electrolyzers; membrane–electrode assembly
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MDPI and ACS Style

Ashdot, A.; Kattan, M.; Kitayev, A.; Tal-Gutelmacher, E.; Amel, A.; Page, M. Design Strategies for Alkaline Exchange Membrane–Electrode Assemblies: Optimization for Fuel Cells and Electrolyzers. Membranes 2021, 11, 686. https://doi.org/10.3390/membranes11090686

AMA Style

Ashdot A, Kattan M, Kitayev A, Tal-Gutelmacher E, Amel A, Page M. Design Strategies for Alkaline Exchange Membrane–Electrode Assemblies: Optimization for Fuel Cells and Electrolyzers. Membranes. 2021; 11(9):686. https://doi.org/10.3390/membranes11090686

Chicago/Turabian Style

Ashdot, Aviv, Mordechai Kattan, Anna Kitayev, Ervin Tal-Gutelmacher, Alina Amel, and Miles Page. 2021. "Design Strategies for Alkaline Exchange Membrane–Electrode Assemblies: Optimization for Fuel Cells and Electrolyzers" Membranes 11, no. 9: 686. https://doi.org/10.3390/membranes11090686

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