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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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Menzler, Norbert H.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Enhancement of Performance and Sulfur Tolerance of Ceria-Based Fuel Electrodes in Low Temperature SOFCcitations
- 2024Space charge governs the kinetics of metal exsolutioncitations
- 2023Impact of GDC Interlayer Microstructure on Strontium Zirconate Interphase Formation and Cell Performance
- 2023Impact of GDC Interlayer Microstructure on Strontium Zirconate Interphase Formation and Cell Performancecitations
- 2023Enhanced metal exsolution at the non-polar (001) surfaces of multi-faceted epitaxial thin filmscitations
- 2015Quantification of double-layer Ni/YSZ fuel cell anodes from focused ion beam tomography datacitations
- 2015Status of light weight cassette design of SOFCcitations
- 2005Nanocrystallized yttria-stabilized zirconia for solid oxide fuel cell applications
- 2004Sol-gel derived yttria-stabilized zirconia electrolytes for solid oxide fuel cells
- 2002Influence of alumina dopant on the properties of yttria-stabilized zirconia for SOFC applications
Places of action
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article
Enhancement of Performance and Sulfur Tolerance of Ceria-Based Fuel Electrodes in Low Temperature SOFC
Abstract
<jats:title>Abstract</jats:title><jats:p>The trend of operating the solid oxide fuel cell at significantly lower operation temperatures enables the application of electrodes with finer microstructure or even nanostructured electrodes with increased active surface and enhanced performance. To maintain the high performance in hydrocarbon fuels commonly impurified with sulfur compounds, a required sulfur tolerance has to be maintained. &#xD;In this study we compare performance and H<jats:sub>2</jats:sub>S-poisoning of four ceria-based electrodes: conventional Ni/Ce<jats:sub>0.9</jats:sub>Gd<jats:sub>0.1</jats:sub>O<jats:sub>2-δ</jats:sub>cermets and sub-µm scaled Ce<jats:sub>0.8</jats:sub>Gd<jats:sub>0.2</jats:sub>O<jats:sub>2-δ</jats:sub>-electrodes with and without infiltrated nickel. Symmetrical cells were operated in a hydrogen/steam/nitrogen gas mixture with and without minor amounts of H<jats:sub>2</jats:sub>S at 600 °C. The performance is analyzed by electrochemical impedance spectroscopy. The distribution of relaxation times is applied to deconvolute the electrochemical processes followed by a complex nonlinear least square fit to quantify the loss processes and the impact of sulfur.&#xD;Whereas two different Ni/Ce<jats:sub>0.9</jats:sub>Gd<jats:sub>0.1</jats:sub>O<jats:sub>2-δ</jats:sub> cermet electrodes exhibit polarization resistances at 600 °C without / with 0.1 ppm H<jats:sub>2</jats:sub>S of 2.89 / 5.56 Ωcm² and 2.15 / 2.75 Ωcm², the single phase Ce<jats:sub>0.8</jats:sub>Gd<jats:sub>0.2</jats:sub>O<jats:sub>2-δ</jats:sub> electrode reaches 0.98 / 2.37 Ωcm². With an infiltration of Ni-nitrate forming nickel nanoparticles on the gadolinia-doped ceria-surfaces, the ASR could be drastically reduced to 0.32 / 0.37 Ωcm².&#xD;</jats:p>