| 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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Boudet, Nathalie
Processes and Engineering in Mechanics and Materials
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2023Influence of the Ge content on the lithiation process of crystalline Si 1− x Ge x nanoparticle-based anodes for Li-ion batteriescitations
- 2022Relationship between atomic structure and excellent glass forming ability in Pd 42.5 Ni 7.5 Cu 30 P 20 metallic glasscitations
- 2022Coupling between elastic strains and phase transition in dense pure zirconia polycrystalscitations
- 2022Relationship between atomic structure and excellent glass forming ability in Pd42.5Ni7.5Cu30P20 metallic glasscitations
- 2021Detailed structural analysis of amorphous Pd40Cu40P20: Comparison with the metallic glass Pd40Ni40P20 from the viewpoint of glass forming abilitycitations
- 2021Detailed structural analysis of amorphous Pd 40 Cu 40 P 20 :Comparison with the metallic glass Pd 40 Ni 40 P 20 from the viewpoint of glass forming abilitycitations
- 2020Prelithiation of silicon/graphite composite anodes: Benefits and mechanisms for long-lasting Li-Ion batteriescitations
- 2019Advanced Non-Destructive in Situ Characterization of Metals with the French Collaborating Research Group D2AM/BM02 Beamline at the European Synchrotron Radiation Facilitycitations
- 2019Advanced Non-Destructive in Situ Characterization of Metals with the French Collaborating Research Group D2AM/BM02 Beamline at the European Synchrotron Radiation Facilitycitations
- 2019Heterogeneous Nanostructural Aging of Fuel Cell Ionomer Revealed by Operando SAXScitations
- 2019Partial structure investigation of the traditional bulk metallic glass Pd40Ni40P20citations
- 2019Partial structure investigation of the traditional bulk metallic glass Pd40Ni40 P20citations
- 2018In situ Synchrotron X-Ray diffraction study of high-temperature stress relaxation in chromia scales containing the reactive element yttriumcitations
- 2017Strains in thermally growing Cr2O3 films measured in situ using synchrotron X-rayscitations
- 2016Tuning the conductivity type in a room temperature magnetic oxide: Ni-doped Ga0.6Fe1.4O3 thin filmscitations
- 2016Reaction of Ni film with In0.53Ga0.47As: Phase formation and texturecitations
- 2016Determination of the cationic distribution in oxidic thin films by resonant X-ray diffraction: the magnetoelectric compound Ga2-xFexO3. Supporting information
- 2016Self-organized arrays of dislocations in thin smectic liquid crystal filmscitations
- 2016Self-organized arrays of dislocations in thin smectic liquid crystal filmscitations
- 2014Probing Self-Assembly of Cylindrical Morphology Block Copolymer Using in Situ and ex Situ Grazing Incidence Small-Angle X-ray Scattering: The Attractive Case of Graphoepitaxycitations
- 2012Key experimental information on intermediate-range atomic structures in amorphous Ge2Sb2Te5 phase change materialcitations
- 2012Anomalous x-ray diffraction measurements of long-range order in (001)-textured L1(0) FePtCu thin filmscitations
- 2011Microstructural mapping of C60 phase transformation into disordered graphite at high pressure, using X-ray diffraction microtomographycitations
- 2007Development of structural order during supercooling of a fragile oxide meltcitations
Places of action
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article
Heterogeneous Nanostructural Aging of Fuel Cell Ionomer Revealed by Operando SAXS
Abstract
Proton exchange membrane fuel cells (PEMFCs) represent one of the most interesting technologies for powering vehicles and small portable electronic devices in an eco-friendly way. Large scale implementation of PEMFCs requires to tailor novel resilient economically viable materials with prolongated lifetimes. One key issue is the durability of the ionomer membrane, which is responsible for the conduction of protons from anode to cathode. Here we report on the impact of aging on the membrane structure by means of operando SAXS. By analyzing the most prominent features of the in-situ aged and pristine spectra at different relevant positions in the fuel cell, we could establish that structural aging is highly heterogeneous and strongly dependent on the local conditions. The increase in current density produces a decrease in ionic nanodomain sizes in aged ionomer due to continuous membrane drying, as in pristine materials. However, long-term operation most dramatically affects the polymer organization into bundles, in particular at the air inlet and in the middle of the cell. Variations of the low-angle intensity of more than an order of magnitude are ascribed to significant increase in the area of interfacial regions, potentially impacting the diffusion within grain boundaries. With this study, we demonstrate that operando SAXS provides unique insights into ionomer structural aging in dependence of the local hydration and helps to identify the relevant scale for physical degradation. This information is needed for optimizing fuel cells operating strategies and improving the durability of membranes.