In Situ Photoelectron and Soft X-ray Emission Spectroscopy Measurements of LaxSr1-xMnO3 Thin Film Cathodes for Solid Oxide Fuel Cells

2012 ◽  
Keyword(s):  
Thin Film ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Emission Spectroscopy ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
X Ray

In situ X-ray Studies of (La,Sr)MnO3_δ, (La,Sr)CoO3_δ, and La0.6Sr0.4Co0.2Fe0.8O3-δ Thin Film SOFC Cathodes Grown by Pulse Laser Deposition

2013 ◽  
Vol 1495 ◽  
Author(s):  
Kee-Chul Chang ◽  
Brian Ingram ◽  
Paul Salvador ◽  
Bilge Yildiz ◽  
Hoydoo You
Keyword(s):  
Thin Film ◽  
Solid Oxide Fuel Cells ◽  
Pulse Laser Deposition ◽  
Pulse Laser ◽  
Solid Oxide ◽  
Laser Deposition ◽  
Pulse Laser Deposition Technique ◽  
Oxide Fuel ◽  
X Ray

ABSTRACTWe will briefly review in situ synchrotron x-ray investigation of model thin film cathode systems for solid oxide fuel cells. The film cathodes examined in this study are (La,Sr)MnO3_δ (LSM), (La,Sr)CoO3_δ (LSC), and La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) thin films epitaxially grown on YSZ single crystal substrates by the pulse laser deposition technique. We find in all cases that Sr is enriched or segregated to the surface of the film cathodes. We concluded that the Sr enrichments or segregations are mainly the results of annealing because they do not depend on whether the cathodes are electrochemically biased or not during annealing. However, at least in the case of LSCF, we find that B-site Co segregates rather uniformly to the surface and the segregation responds sensitively and reversibly to the electrochemical bias.

scholarly journals Estimation of micro-size defects in electrolyte thin-film by X-ray stress measurement for anode-supported solid oxide fuel cells

2016 ◽  
Vol 3 (6) ◽  
pp. 16-00177-16-00177 ◽  
Author(s):  
Hirofumi SUMI ◽  
Hiroyuki SHIMADA ◽  
Kazuhisa SATO ◽  
Toshiyuki HASHIDA
Keyword(s):  
Thin Film ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Stress Measurement ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
X Ray

scholarly journals X-ray Absorption under Operating Conditions for Solid-Oxide Fuel Cells Electrocatalysts: The Case of LSCF/YSZ

Surfaces ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 32-40 ◽  
Author(s):  
Francesco Giannici ◽  
Giuliano Gregori ◽  
Alessandro Longo ◽  
Alessandro Chiara ◽  
Joachim Maier ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Operating Conditions ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
X Ray ◽  
High Temperature Materials ◽  
X Ray Absorption ◽  
Electrical Bias

We describe a novel electrochemical cell for X-ray absorption spectroscopy (XAS) experiments during electrical polarization suitable for high-temperature materials such as those used in solid oxide fuel cells. A half-cell LSCF/YSZ was then investigated under cathodic and anodic conditions (850 °C and applied electrical bias ranging from +1 V to −1 V in air). The in situ XAS measurements allowed us to follow the LSCF degradation into simple oxides. The rapid deterioration of LSCF is ascribed to the formation of excess of oxygen vacancies leading to the collapse of the mixed perovskite structure.

scholarly journals Effect of Water Adsorption on Conductivity in Epitaxial Sm0.1Ce0.9O2-  Thin Film for Micro Solid Oxide Fuel Cells Applications

2015 ◽  
Vol 69 (16) ◽  
pp. 39-48 ◽  
Author(s):  
N. Yang ◽  
E. Strelcov ◽  
A. Belianinov ◽  
A. Tebano ◽  
V. Foglietti ◽  
...  
Keyword(s):  
Thin Film ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Water Adsorption ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Effect Of Water
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