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High-performance and cost-effective membrane electrode assemblies for advanced proton exchange membrane water electrolyzers: Long-term durability assessment |
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| Authors: | Gholamreza Mirshekari Ryan Ouimet Zhiqiao Zeng Haoran Yu Stoyan Bliznakov Leonard Bonville Allison Niedzwiecki Chris Capuano Katherine Ayers Radenka Maric |
| Affiliation: | 1. Center for Clean Energy Engineering, University of Connecticut, Storrs, 06269-5233, CT, USA;2. Department of Chemical and Bimolecular Engineering, University of Connecticut, Storrs, 06269-5233, CT, USA;3. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, 37830, TN, USA;4. Nel Hydrogen, Wallingford, 06492, CT, USA |
| Abstract: | Improved activity and durability performance of a two-cell (86 cm2) proton exchange membrane water electrolyzer (PEMWE) stack is reported for the first time. Both membrane electrode assemblies (MEAs) contain one order of magnitude lower platinum group metal (PGM) loadings compared to the state-of-the-art PEMWEs and incorporate novel Pt recombination layers. The high-performance and cost-effective MEAs are fabricated by the unique reactive spray deposition technology (RSDT). This advanced methodology allows for one-step fabrication of MEAs and ensures precise control and distribution of the catalyst composition and loading. The RSDT-fabricated MEAs contain only 0.2 and 0.3 mgPGM cm?2 loading in the cathode and anode electrodes, respectively, and demonstrate excellent activity and durability for over 3000 h of operation at industrially-relevant operating conditions without showing significant loss in performance. This novel work shows that a significant cost reduction for PEMWEs is achieved while maintaining excellent durability, high catalysts activities, and low hydrogen cross-over. |
| Keywords: | High durability High-performance Low-loaded membrane electrode assembly Proton exchange membrane water electrolyzer Reactive spray deposition technology |
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