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SrCo0.8Fe0.1Ga0.1O3−δ (SCFG) cathodes incorporated with Sm0.2Ce0.8O1.9 (SDC) for IT-SOFCs application

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Abstract

A new type of electronic-oxygen ion conductor Sm0.2Ce0.8O1.9 (SDC) modified SrCo0.8Fe0.1Ga0.1O3−δ (SCFG) cathode is produced using a simple solution infiltration as IT-SOFC cathodes. Likewise, the SCFG cathode is mixed with the SDC powder to prepare conventional composite cathodes. The prepared cathodes are assessed in regard to their thermal, structural, electrical, and electrochemical features. Thermal expansion of the composite SCFG-SDC cathodes is well-compatible with that of the SDC electrolyte. For the SCFG cathode, peak conductivity reached 315.6 S cm−1 at 600 °C. The polarization resistance of blank SCFG electrode attain 0.5 Ω cm2 at 800 °C, which is higher than those of 0.38, 0.16, and 0.32 Ω cm2 for 10, 30, and 50% wt SDC-SCFG mixed composite electrodes, respectively. The polarization resistances for 7, 14, and 21 wt% SDC-infiltrated SCFG cathodes are measured to be 0.25, 0.1, and 0.14 Ω cm2 at 800 °C.

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Acknowledgements

This research is supported by Shiraz University and the National Iranian Copper Industry Company, which are greatly acknowledged.

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  1. Department of Materials Science and Engineering, School of Engineering, Shiraz University, Shiraz, P.O.Box: 7134851154, Iran

    Marzieh Kiani & Mohammad Hossein Paydar

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by MK. The first draft of the manuscript was written by MK under supervision of MHP. All authors read and approved the final manuscript.

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Correspondence to Mohammad Hossein Paydar.

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Kiani, M., Paydar, M.H. SrCo0.8Fe0.1Ga0.1O3−δ (SCFG) cathodes incorporated with Sm0.2Ce0.8O1.9 (SDC) for IT-SOFCs application. J Mater Sci: Mater Electron 34, 1366 (2023). https://doi.org/10.1007/s10854-023-10773-4

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