| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chiriaev, Serguei
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Topics
Publications (19/19 displayed)
- 2023Nanoscale thinning of metal-coated polypropylene films by Helium-ion irradiation
- 2023Nanoscale thinning of metal-coated polypropylene films by Helium-ion irradiation
- 2022Post-degradation case study of the membrane electrode assembly from a low-temperature PEMFC stack
- 2022Post-degradation case study of the membrane electrode assembly from a low-temperature PEMFC stack
- 2022Insights into Degradation of the Membrane–Electrode Assembly Performance in Low-Temperature PEMFC:the Catalyst, the Ionomer, or the Interface?citations
- 2022Insights into Degradation of the Membrane–Electrode Assembly Performance in Low-Temperature PEMFCcitations
- 2020Out-of-plane surface patterning by subsurface processing of polymer substrates with focused ion beamscitations
- 2019Anomalous anisotropy in superconducting nanodiamond films induced by crystallite geometrycitations
- 2018FIB NANOPATTERNING OF METAL FILMS ON PMMA SUBSTRATES: NON-SPUTTERING MODE
- 2018Transition to Superwetting for a Nanostructured Surface
- 2018Transition to Superwetting for a Nanostructured Surface
- 2018Mapping the transition to superwetting state for nanotextured surfaces templated from block-copolymer self-assemblycitations
- 2018Mapping the transition to superwetting state for nanotextured surfaces templated from block-copolymer self-assemblycitations
- 2018Mapping the transition to superwetting state for nanotextured surfaces templated from block-copolymer self-assemblycitations
- 2017Helium Ion Microscopy of proton exchange membrane fuel cell electrode structurescitations
- 2017Helium Ion Microscopy of proton exchange membrane fuel cell electrode structurescitations
- 2016Challenges of fabricating plasmonic and photonic structures with Neon ion beam milling
- 2016Titanium Nitride as a Strain Gauge Materialcitations
- 2016Titanium Nitride as a Strain Gauge Materialcitations
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article
Insights into Degradation of the Membrane–Electrode Assembly Performance in Low-Temperature PEMFC
Abstract
Here, we report a study on the structural characteristics of membrane electrode assembly (MEA) samples obtained from a low-temperature (LT) polymer electrolyte membrane (PEM) fuel cell (FC) stack subjected to long-term durability testing for ∼18,500 h of nominal operation along with ∼900 on/off cycles accumulated over the operation time, with the total power production being 3.39 kW h/cm2 of MEA and the overall degradation being 87% based on performance loss. The chemical and physical states of the degraded MEAs were investigated through structural characterizations aiming to probe their different components, namely the cathode and anode electrocatalysts, the Nafion ionomer in the catalyst layers (CLs), the gas diffusion layers (GDLs), and the PEM. Surprisingly, X-ray diffraction and electron microscopy studies suggested no significant degradation of the electrocatalysts. Similarly, the cathode and anode GDLs exhibited no significant change in porosity and structure as indicated by BET analysis and helium ion microscopy. Nevertheless, X-ray fluorescence spectroscopy, elemental analysis through a CHNS analyzer, and comprehensive investigations by X-ray photoelectron spectroscopy suggested significant degradation of the Nafion, especially in terms of sulfur content, that is, the abundance of the −SO3– groups responsible for H+ conduction. Hence, the degradation of the Nafion, in both of the CLs and in the PEM, was found to be the principal mechanism for performance degradation, while the Pt/C catalyst degradation in terms of particle size enlargement or mass loss was minimal. The study suggests that under real-life operating conditions, ionomer degradation plays a more significant role than electrocatalyst degradation in LT-PEMFCs, in contrast to many scientific studies under artificial stress conditions. Mitigation of the ionomer degradation must be emphasized as a strategy to improve the PEMFC’s durability.