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The Electrochemical Society, ECS Transactions, 1(57), p. 2041-2049, 2013

DOI: 10.1149/05701.2041ecst

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The Effect of Cation Substitution on Chemical Stability of Ba0.5Sr0.5Co0.8Fe0.2O3- -Based Mixed Conductors

Journal article published in 2013 by F. Wang, T. Nakamura ORCID, K. Yashiro, J. Mizusaki, K. Amezawa
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Cubic perovskite Ba0.5Sr0.5Co0. 8Fe0.1R0.1O3–δ (R=Fe, Nb, Mo, Sb) was synthesized, and the chemical stability under high oxygen partial pressure (p(O2)) was studied by using HT-XRD in the temperature range of 773-1373 K. It was found that Ba0.5Sr0.5Co0. 8Fe0.1Sb0.1O3–δ was remarkably stable than Ba0.5Sr0.5Co0. 8Fe0.2O3–δ and Ba0.5Sr0.5Co0. 8Fe0.1Mo0.1O3–δ in high p(O2) condition. The effect of B-site substitution on the CO2-tolerance of Ba0.5Sr0.5Co0. 8Fe0.1R0.1O3–δ was also investigated by TG-DTA analysis at 300-1373 K. It was demonstrated that the chemical stability of Ba0.5Sr0.5Co0. 8Fe0.2O3–δ against CO2 could be significantly improved when Fe were partially substituted by Nb or Sb ions.