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Preparation and electrochemical performance of cobalt-free cathode material Ba0.5Sr0.5Fe0.9Nb0.1O3−δ for intermediate-temperature solid oxide fuel cells

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Abstract

Perovskite oxide Ba0.5Sr0.5Fe0.9Nb0.1O3−δ (BSFN) as a cobalt-free cathode for intermediate-temperature solid oxide fuel cells(IT-SOFCs) on the Ce0.8Sm0.2O1.9(SDC) and La0.9Sr0.1Ga0.8Mg0.2O3−δ (LSGM) electrolytes was prepared and investigated. The single phase BSFN oxide with a cubic perovskite structure and relatively high electrical conductivities was obtained after sintering at 1250 °C for 10 h in air. The BSFN cathode exhibited excellent chemical stability on the SDC and LSGM electrolytes at temperatures below 950 °C. The area specific resistance of the BSFN cathode on the SDC and LSGM electrolytes were 0.024 and 0.021 Ω·cm2 at 800 °C, respectively. The maximum power densities of the single cell with BSFN cathode in 300 μm-thick SDC and LSGM electrolytes achieved 414 and 516 mW/cm2 at 800 °C, respectively. These results show that the BSFN material is a promising cobalt-free cathode candidate to be used in IT-SOFCs. A combination of the BSFN cathode and LSGM electrolyte is preferred owing to its excellent electrochemical performance.

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Authors and Affiliations

  1. Key Laboratory of Physics and Technology for Advanced Batteries, Ministry of Education, College of Physics, Jilin University, Changchun, 130012, P. R. China

    Wen Long, Huawei Xu & Tianmin He

Authors
  1. Wen Long
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  2. Huawei Xu
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  3. Tianmin He
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Corresponding author

Correspondence to Tianmin He.

Additional information

Supported by the National Natural Science Foundation of China(No.10974065) and the Applied Basic Research Programs of Science and Technology Development of Jilin Province, China(No.20130102011JC).

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Long, W., Xu, H. & He, T. Preparation and electrochemical performance of cobalt-free cathode material Ba0.5Sr0.5Fe0.9Nb0.1O3−δ for intermediate-temperature solid oxide fuel cells. Chem. Res. Chin. Univ. 30, 806–810 (2014). https://doi.org/10.1007/s40242-014-4130-y

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  • DOI: https://doi.org/10.1007/s40242-014-4130-y

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