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Thermodynamic modeling of La2O3–SrO–Mn2O3–Cr2O3 for solid oxide fuel cell applications

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Abstract

The thermodynamic La–Sr–Mn–Cr–O oxide database is obtained as an extension of thermodynamic descriptions of oxide subsystems using the calculation of phase diagrams approach. Concepts of the thermodynamic modeling of solid oxide phases are discussed. Gibbs energy functions of SrCrO4, Sr2.67Cr2O8, Sr2CrO4, and SrCr2O4 are presented, and thermodynamic model parameters of La–Sr–Mn–Chromite perovskite are given. Experimental solid solubilities and nonstoichiometries in La1−xSrxCrO3−δ and LaMn1−xCrxO3−δ are reproduced by the model. The presented oxide database can be used for applied computational thermodynamics of traditional lanthanum manganite cathode with Cr-impurities. It represents the fundament for extensions to higher orders, aiming on thermodynamic calculations in noble symmetric solid oxide fuel cells.

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Authors and Affiliations

  1. Nonmetallic Inorganic Materials, Department of Materials, Eidgenössische Technische Hochschule (ETH) Zürich, 8093, Zurich, Switzerland

    E. Povoden-Karadeniz, Toni Ivas & L. J. Gauckler

  2. DTU Energy Conversion, Department of Energy Conversion and Storage, Technical University of Denmark, 4000, Roskilde, Denmark

    M. Chen

  3. Concast AG, 8002, Zurich, Switzerland

    A. N. Grundy

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  1. E. Povoden-Karadeniz
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  2. M. Chen
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  3. Toni Ivas
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  4. A. N. Grundy
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  5. L. J. Gauckler
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Correspondence to E. Povoden-Karadeniz.

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Povoden-Karadeniz, E., Chen, M., Ivas, T. et al. Thermodynamic modeling of La2O3–SrO–Mn2O3–Cr2O3 for solid oxide fuel cell applications. Journal of Materials Research 27, 1915–1926 (2012). https://doi.org/10.1557/jmr.2012.149

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