| 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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Sun, Xiufu
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Solid Oxide Electrochemical Cells for Nitrogen and Oxygen Production
- 2022Metal Supported Electrolysis Cellscitations
- 2021Ni migration in solid oxide cell electrodes:Review and revised hypothesiscitations
- 2021Ni migration in solid oxide cell electrodes: Review and revised hypothesiscitations
- 2021Ni migration in solid oxide cell electrodes: Review and revised hypothesiscitations
- 2020Co-electrolysis of steam and carbon dioxide in large area solid oxide cells based on infiltrated mesoporous oxygen electrodescitations
- 2020Metal Supported SOFCs for Mobile Applications using Hydrocarbon Fuelscitations
- 2020Review of Ni migration in SOC electrodes
- 2020Review of Ni migration in SOC electrodes
- 2019Comprehensive Hypotheses for Degradation Mechanisms in Ni-Stabilized Zirconia Electrodescitations
- 2019Comprehensive Hypotheses for Degradation Mechanisms in Ni-Stabilized Zirconia Electrodescitations
- 2019Internal reforming on Metal supported SOFCscitations
- 2018Diffusion rates of reactants and components in solid oxide cells
- 2017Investigation of a Spinel-forming Cu-Mn Foam as an Oxygen Electrode Contact Material in a Solid Oxide Cell Single Repeating Unitcitations
- 2014TOF-SIMS characterization of impurity enrichment and redistribution in solid oxide electrolysis cells during operationcitations
Places of action
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document
Diffusion rates of reactants and components in solid oxide cells
Abstract
The electrochemical performance of solid oxide electrolysis cells (SOECs) is very dependent on diffusion rates of the gaseous reactants through the porous electrodes, and the degradation rate of SOEC Ni/YSZ electrodes can be dependent on Ni-migration. The Ni-migration is dependent on electrode polarization and diffusion rate of Ni-containing minority species impact the migration. The electrode polarization as well as the diffusion rate of minority Ni-species are dependent on the partial pressure and pressure gradient of H2O as well as on electrochemical potential gradients. Thus, the H2O diffusion gradient resulting from the electrical load of the cell is expected to affect the Ni migration.<br/>Therefore, this contribution first evaluates and discusses the diffusion rates of H2/H2O and CO/CO2 in porous Ni-YSZ composites. A 10 kh durability test with electrochemical impedance spectroscopy recorded at the beginning and end of the test show significant signs of change in the diffusion resistance.<br/>Next, the diffusion rate of Ni-species is evaluated based on observed migration of Ni in the electrochemical active Ni-YSZ layer with sub-micron Ni particles. This is compared with catalysis research literature and models for Ni particle diffusivity [1].<br/>Based on the presented results and literature study a modified hypothesis for Ni-migration is provided.