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A 2D and 3D X-ray ?-diffraction and ?-fluorescence study of a mixed ionic electronic conductor

Published on 29 March 2018
A 2D and 3D X-ray ?-diffraction and ?-fluorescence study of a mixed ionic electronic conductor
Sanchez D.F., Grolimund D., Hubert M., Bleuet P., Laurencin J.
Source-TitleInternational Journal of Hydrogen Energy
Swiss Light Source, Paul Scherrer Institut, Villigen PSI, Switzerland, Univ. Grenoble Alpes, Grenoble, France, CEA/Liten, MINATEC Campus, 17 rue des Martyrs, Grenoble, France, CEA/LETI, MINATEC Campus, Grenoble, France
Due to the mixed ionic electronic conductive properties of the Lanthanum Strontium Cobalt Ferrite (LSCF) La0.6Sr0.4Co0.2Fe0.8O3??compound, it is of great scientific and technological interest. Especially in the Solid Oxide Fuel Cell (SOFC) technology, this compound has receiving great attention as a cathode material. However, its chemical reactivity with the Yttria-stabilized Zirconia (YSZ) electrolyte still remains one of the main challenges, which demands a comprehension in the ?m and sub-?m range. In order to address the reactivity issues locally in the micrometre scale range, 2D and 3D X-ray ?-diffraction and ?-fluorescence analysis have been performed on a pristine LSCF cathode layer. The cathode was deposited on a dense YSZ electrolyte substrate spaced by a thin Gadolinium doped Ceria Oxide (CGO) barrier layer in between LSCF and YSZ to limit the reactivity. The present approach offers a larger field of view in comparison to electron microscopy techniques. The method can provide a more representative information and may offer some insights on the reactivity distribution along the interfaces. The formation of micro SrZrO3inclusions in LSCF layer is then indubitably identified, as well as in the CGO/YSZ interface. © 2016 Hydrogen Energy Publications LLC
Solid oxide fuel cell, X-ray diffraction tomography, X-ray fluorescence tomography, X-ray micro beam
Cathodes, Cobalt compounds, Electrodes, Electrolytes, Fluorescence, Fuel cells, Optical tomography, Solid oxide fuel cells (SOFC), Tomography, X ray diffraction, Yttria stabilized zirconia, Zirconia, Fluorescence analysis, Gadolinium doped ceria, Lanthanum strontium cobalt ferrite, Mixed ionic electronic conductor (MIEC), Mixed ionic-electronic conductive, X ray fluorescence, X-ray micro beams, Yttria-stabilized zirconias (YSZ), Solid electrolytes

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