| 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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Morgen, Per
University of Southern Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Impact of drug compounds mechanical/deformation properties on the preparation of nano- and microsuspensionscitations
- 2024Impact of drug compounds mechanical/deformation properties on the preparation of nano- and microsuspensionscitations
- 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
- 2022En metode til at danne kobberlag på porøst aluminium oxid (PAO) på et substrat af aluminium legering ; A method for manufacturing copper film on porous aluminum oxide (pao) on an aluminum alloy substrate
- 2022Insights into Degradation of the Membrane–Electrode Assembly Performance in Low-Temperature PEMFC:the Catalyst, the Ionomer, or the Interface?citations
- 2022A method for manufacturing copper film on porous aluminum oxide (pao) on an aluminum alloy substrate
- 2022Insights into Degradation of the Membrane–Electrode Assembly Performance in Low-Temperature PEMFCcitations
- 2020Platinum recycling through electroless dissolution under mild conditions using a surface activation assisted Pt-complexing approachcitations
- 2020Platinum recycling through electroless dissolution under mild conditions using a surface activation assisted Pt-complexing approachcitations
- 2017Growth of aluminum oxide on silicon carbide with an atomically sharp interfacecitations
- 2016The effect of trace amounts of copper on the microstructure, stability and oxidation of macroporous silicon carbidecitations
- 2016The effect of trace amounts of copper on the microstructure, stability and oxidation of macroporous silicon carbidecitations
- 2016The role of aluminium as an additive element in the synthesis of porous 4H-silicon carbidecitations
- 2016The role of aluminium as an additive element in the synthesis of porous 4H-silicon carbidecitations
- 2015The role of Aluminium in the synthesis of Mesoporous 4H Silicon Carbide
- 2015The role of Aluminium in the synthesis of Mesoporous 4H Silicon Carbide
- 2013Investigations on sputter deposited LiCoO2 thin films from powder targetcitations
- 2009Self-activated, self-limiting reactions on Si surfaces
- 2006Epitaxial growth of Al on Si(1 1 1) with Cu buffer layerscitations
Places of action
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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.