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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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Miyayama, Masaru
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2012High capacity positive electrodes for secondary Mg-ion batteriescitations
- 2012Synthesis and electrochemical behavior of hollandite MnO2/acetylene black composite cathode for secondary Mg-ion batteriescitations
- 2011The diffusions and associated interfacial layer formation between thin film electrolyte and cermet anode in IT-SOFCcitations
- 2011Diffusion and segregation along grain boundary at the electrolyte–anode interface in IT-SOFCcitations
- 2011Mutual diffusion and microstructure evolution at the electrolyte−anode interface in intermediate temperature solid oxide fuel cellcitations
- 2007Cathode performance of nanostructured La1-aSraCo1-bFebO3- on a Ce0.8Sm0.2O2 electrolyte prepared by citrate-nitrate auto-combustioncitations
- 2006Electrode performance of nanostructured La1-aSraCo1-bFebO3-x on a Ce0.8Sm0.2O2 electrolyte prepared by citrate nitrate auto-combustioncitations
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article
Mutual diffusion and microstructure evolution at the electrolyte−anode interface in intermediate temperature solid oxide fuel cell
Abstract
The microstructure and elemental distribution of the gadolinium-doped ceria (GDC) thin film electrolyte, Ni-GDC cermet anode, and the interface between them were comprehensively characterized by high-resolution transmission electron microscopy (HR-TEM) and energy-dispersive X-ray spectroscopy (EDX) operated in scanning TEM (STEM) mode. HR-TEM observations show newly appeared microstructure (i.e., superstructures) formations at both GDC and metallic Ni grains at the electrolyte−anode interface. STEM-EDX mapping and line scan analyses illustrate that not only can Ni diffuse into GDC grains as previously reported but also Ce and Gd can diffuse into metallic Ni particles with equal diffusion lengths as that of Ni diffusion. Such mutual diffusion is independent of ionic radii and can result in the valence state change of diffusing ions, verified by electron energy loss spectroscopy investigations. Therefore, the mutual diffusion and related microstructural evolutions are elucidated to be dominating factors that lead to the interfacial layer formation between anode and electrolyte, which is identified to have a considerable influence on the ionic conductivity behavior in intermediate temperature solid oxide fuel cells.