Actions for An Investigation of LSF-YSZ Conductive Scaffolds for Infiltrated SOFC Cathodes [electronic resource].

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An Investigation of LSF-YSZ Conductive Scaffolds for Infiltrated SOFC Cathodes [electronic resource].

Published
Washington, D.C. : United States. Office of the Assistant Secretary of Energy for Fossil Energy, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages F525-F529 : digital, PDF file
Additional Creators
United States. Office of the Assistant Secretary of Energy for Fossil Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Porous composites of Sr-doped LaFeO3 (LSF) and yttria-stabilized zirconia (YSZ) were investigated as conductive scaffolds for infiltrated SOFC cathodes with the goal of producing scaffolds for which only a few perovskite infiltration steps are required to achieve sufficient conductivity. While no new phases form when LSF-YSZ composites are calcined to 1623 K, shifts in the lattice parameters indicate Zr can enter the perovskite phase. Measurements on dense, LSF-YSZ composites show that the level of Zr doping depends on the Sr:La ratio. Because conductivity of undoped LSF increases with Sr content while both the ionic and electronic conductivities of Zr-doped LSF decrease with the level of Zr in the perovskite phase, there is an optimum initial Sr content corresponding to La0.9Sr0.1FeO3 (LSF91). Although scaffolds made with 100% LSF had a higher conductivity than scaffolds made with 50:50 LSF-YSZ mixtures, the 50:50 mixture provides the optimal interfacial structure with the electrolyte and sufficient conductivity, providing the best cathode performance upon infiltration of La0.6Sr0.4Co0.2Fe0.8O3 (LSCF).
Report Numbers
E 1.99:1427990
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Note
Published through SciTech Connect.
03/24/2017.
Journal of the Electrochemical Society 164 6 ISSN 0013-4651 AM
Yuan Cheng; Tae-Sik Oh; Rachel Wilson; Raymond J. Gorte; John M. Vohs.
Univ. of Pennsylvania, Philadelphia, PA (United States)
Funding Information
FE0023317
View MARC record | catkey: 24045648