One of the main drawbacks of anode-supported solid oxide fuel cell technology is the limited capability to withstand reduction and oxidation (“RedOx”) of the Ni phase. This study compares the effect of RedOx cycles on curvature and strength of half-cells, composed of a nickel-yttria-stabilized-zirconia (Ni-YSZ) support, a Ni-YSZ anode, and an 8YSZ electrolyte. Five different treatments are studied: (i) reduction at , (ii) reduction at , (iii) 1RedOx cycle at , (iv) 5RedOx cycles at , and (v) 5RedOx cycles at . The strength is measured by the ball-on-ring method, where it is calculated analytically from the force. In this calculation the thermal stresses are estimated from the curvature of the half-cell. For each treatment, more than 30 samples are tested. About 20 ball-on-ring samples are laser cut from one original half-cell. Curvature and porosity are measured for each sample before and after RedOx treatments. The first observations show that increasing the reduction temperature enhance strength but does not influence the curvature, whereas 1RedOx cycle at increases the curvature without changing the strength. Consecutive RedOx cycles seem to decrease anode-supported cell strength but this is coupled to lower porosity of the tested samples.
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October 2010
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Curvature and Strength of Ni-YSZ Solid Oxide Half-Cells After Redox Treatments
Antonin Faes,
Antonin Faes
Laboratory of Industrial Energy Systems (LENI) and Interdisciplinary, Centre for Electron Microscopy (CIME),
Ecole Polytechnique Fédérale de Lausanne (EPFL)
, CH-1015 Lausanne, Switzerland
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Henrik Lund Frandsen,
Henrik Lund Frandsen
Department of Fuel Cells and Solid State Chemistry, Risø National Laboratory,
Technical University of Denmark
, DK-4000 Roskilde, Denmark
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Mikko Pihlatie,
Mikko Pihlatie
Department of Fuel Cells and Solid State Chemistry, Risø National Laboratory,
Technical University of Denmark
, DK-4000 Roskilde, Denmark
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Andreas Kaiser,
Andreas Kaiser
Department of Fuel Cells and Solid State Chemistry, Risø National Laboratory,
Technical University of Denmark
, DK-4000 Roskilde, Denmark
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Darlene R. Goldstein
Darlene R. Goldstein
Institut de Mathématiques (IMA),
Ecole Polytechnique Fédérale de Lausanne (EPFL)
, CH-1015 Lausanne, Switzerland
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Antonin Faes
Laboratory of Industrial Energy Systems (LENI) and Interdisciplinary, Centre for Electron Microscopy (CIME),
Ecole Polytechnique Fédérale de Lausanne (EPFL)
, CH-1015 Lausanne, Switzerland
Henrik Lund Frandsen
Department of Fuel Cells and Solid State Chemistry, Risø National Laboratory,
Technical University of Denmark
, DK-4000 Roskilde, Denmark
Mikko Pihlatie
Department of Fuel Cells and Solid State Chemistry, Risø National Laboratory,
Technical University of Denmark
, DK-4000 Roskilde, Denmark
Andreas Kaiser
Department of Fuel Cells and Solid State Chemistry, Risø National Laboratory,
Technical University of Denmark
, DK-4000 Roskilde, Denmark
Darlene R. Goldstein
Institut de Mathématiques (IMA),
Ecole Polytechnique Fédérale de Lausanne (EPFL)
, CH-1015 Lausanne, SwitzerlandJ. Fuel Cell Sci. Technol. Oct 2010, 7(5): 051011 (7 pages)
Published Online: July 19, 2010
Article history
Received:
August 14, 2009
Revised:
November 12, 2009
Online:
July 19, 2010
Published:
July 19, 2010
Citation
Faes, A., Lund Frandsen, H., Pihlatie, M., Kaiser, A., and Goldstein, D. R. (July 19, 2010). "Curvature and Strength of Ni-YSZ Solid Oxide Half-Cells After Redox Treatments." ASME. J. Fuel Cell Sci. Technol. October 2010; 7(5): 051011. https://doi.org/10.1115/1.4001019
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