Enhanced oxygen diffusion in low barium-containing La0.2175Pr0.2175Ba0.145Sr0.4Fe0.8Co0.2O3−δ intermediate temperature solid oxide fuel cell cathodes

Abstract
Isotopic tracer diffusion studies have been performed on the perovskite composition La 0.2175Pr 0.2175Ba 0.145Sr 0.4Fe 0.8Co 0.2O 3-δ to obtain the diffusion and surface exchange coefficients for oxygen. This material has been identified as a highly active electrocatalytic cathode for intermediate temperature solid oxide fuel cells. The oxygen diffusion coefficients obtained in the 450-650 °C temperature range are higher than the ones measured for most of the cathode materials reported in the literature and they agree with those calculated from electrochemical impedance spectroscopy measurements performed on symmetrical cells. © 2012 Elsevier B.V. All rights reserved.

Citation
Vert VB, Serra JM, Kilner JA, Burriel M (2012) Enhanced oxygen diffusion in low barium-containing La0.2175Pr0.2175Ba0.145Sr0.4Fe0.8Co0.2O3−δ intermediate temperature solid oxide fuel cell cathodes. Journal of Power Sources 213: 270–274. Available: http://dx.doi.org/10.1016/j.jpowsour.2012.04.041.

Acknowledgements
Funding from the Universitat Politecnica de Valencia (grants FPI-UPV-2007-06 and PAID-00-10) and Spanish Government (grant ENE2011-24761) is kindly acknowledged. The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no : PIEF-GA-2009-252711 and from King Abdullah University of Science and Technology (KAUST) through a research grant. The authors would like to thank S. Jimenez for material and sample preparation and Dr. S. Fearn, R. Charter and S. Cook for their help with ToF-SIMS analysis.

Publisher
Elsevier BV

Journal
Journal of Power Sources

DOI
10.1016/j.jpowsour.2012.04.041

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