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Correlation of thermal properties and electrical conductivity of La0.7Sr0.3Cu0.2Fe0.8O3−δ material for solid oxide fuel cells

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Abstract

A copper-doped ferrite with the chemical composition La0.7Sr0.3Cu0.2Fe0.8O3−δ (LaSrCuFe) was prepared using the classical ceramics method starting from the oxides. The linear thermal expansion coefficient in air was measured in the temperature range between 550 and 1,250 K to be between 10 × 10−6 and 15 × 10−6 K−1. The electrical conductivity in air was found to be higher than 100 S cm−1 for temperatures lower than 1,100 K. A change of oxygen stoichiometry was found above 650 K in an atmosphere of 20 vol% oxygen with argon. This change can be correlated with the electrical conductivity.

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Authors and Affiliations

  1. Forschungszentrum Jülich GmbH, Jülich, Germany

    Jürgen Wackerl, Thomas Koppitz & Torsten Markus

  2. Korea Institute of Energy Research (KIER), Daejeon, Korea

    Dong-Hyun Peck & Sang-Kuk Woo

Authors
  1. Jürgen Wackerl
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  2. Thomas Koppitz
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  3. Dong-Hyun Peck
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  4. Sang-Kuk Woo
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  5. Torsten Markus
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Correspondence to Jürgen Wackerl.

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Wackerl, J., Koppitz, T., Peck, DH. et al. Correlation of thermal properties and electrical conductivity of La0.7Sr0.3Cu0.2Fe0.8O3−δ material for solid oxide fuel cells. J Appl Electrochem 39, 1243–1249 (2009). https://doi.org/10.1007/s10800-009-9790-9

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  • DOI: https://doi.org/10.1007/s10800-009-9790-9

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