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Chemical compatibility study of BSCF cathode materials with proton-conducting BCY/BCZY/BZY electrolytes

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Abstract

Ba0.5Sr0.5Co1−xFexO3−δ (BSCF) is a well-recognized cathode material for IT-SOFC. In this work, Ba0.5Sr0.5Co1−xFexO3−δ (BSCF) where x = 0.2, 0.4, 0.6, 0.8 compositions were synthesized by gel-combustion method using glycine as a fuel. Powder X-ray diffraction confirms the formation of single phase for all the compositions. As we are looking for the application of BSCF cathode for proton-conducting SOFCs, compatibility studies were made with BaCe0.8Y0.2O3−δ (BCY), BaCe0.4Zr0.4Y0.2O3−δ (BCZY) and BaZr0.8Y0.2O3−δ (BZY) electrolytes which are known to have good proton-conducting properties at elevated temperatures. Ba0.5Sr0.5Co0.4Fe0.6O3−δ (BSC4F6) and Ba0.5Sr0.5Co0.2Fe0.8O3−δ (BSC2F8) compositions showed good chemical compatibility with selected electrolyte materials at cell fabrication as well as cell operating temperature making them an appropriate cathode material. Electrical property of all the BSCF compositions was measured in air up to 1073 K by four-probe dc technique. The results showed very little effect of Fe substitution on electrical properties.

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Acknowledgements

One of the authors, Dr. Pooja Sawant Mahadik, gratefully acknowledges Department of Atomic Energy (DAE) for providing financial support during the research work.

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Authors and Affiliations

  1. Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India

    A. N. Shirsat, Bandhan Saha, Deepak Tyagi & S. Varma

  2. Institute of Chemical Technology, Matunga, Mumbai, 400019, India

    Niranjan Sitapure

  3. Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India

    S. Varma

  4. Formerly with Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India

    Pooja Sawant Mahadik, B. N. Wani & S. R. Bharadwaj

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  1. Pooja Sawant Mahadik
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Correspondence to S. Varma.

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Mahadik, P.S., Shirsat, A.N., Saha, B. et al. Chemical compatibility study of BSCF cathode materials with proton-conducting BCY/BCZY/BZY electrolytes. J Therm Anal Calorim 137, 1857–1866 (2019). https://doi.org/10.1007/s10973-019-08082-2

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