| 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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document
Post-degradation case study of the membrane electrode assembly from a low-temperature PEMFC stack
Abstract
Here, we report a study on the structural characteristics of the membrane electrode assembly (MEA) samples obtained from a low-temperature polymer electrolyte membrane fuel cell (LT-PEMFC) stack subjected to a long-term durability study by operating for ~18000 h under real-life conditions. The chemical and physical state of the degraded MEAs obtained from industrial partner were investigated through structural characterizations aiming to probe their different components, namely the cathode and anode electrocatalysts, the Nafion® ionomer in the catalyst layer, the gas diffusion layers (GDLs) and the PEM electrolyte. 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 structure and porosity under Helium Ion Microscopy (HIM) observation. Size exclusion chromatography (SEC) and thermogravimetry (TG) confirmed macrostructure integrity of the polymer electrolyte.<br/>Nevertheless, X-ray photoelectron spectroscopy (XPS), X-ray fluorescence spectroscopy (XRF) and elemental analysts through CHN analyzer suggested significant degradation of the sulfonic group, especially in terms of sulfur content, which indicates a considerable reduction of proton conductivity. As shown in Figure 1, a sample taken from the electrode catalyst layer after MEA delamination, the relative intensities of the peak corresponding to the –SO3- group w.r.t. the –O–CF2– group are considerably lower for spent electrodes compared to the pristine ones.<br/>Hence, degradation of the Nafion®, especially in form of ionomer contributing the triple-phase-boundary (TPB) in the catalyst layer was found to be the principal cause for the performance degradation, while the Pt/C catalyst degradation in terms of particle size enlargement, dissolution or change of crystallinity was minimal. The study suggests that under real-life operating conditions, the ionomer degradation plays a significant role over the electrocatalyst degradation in low temperature PEMFCs. Mitigation of the ionomer degradation must be emphasized as a strategy to strengthen the PEMFC durability.