Abstract
The performance of YBa0.5Sr0.5Co1.4Cu0.6O5+δ(YBSCCO)–Sm0.2Ce0.8O1.9 (SDC) composite cathode for SOFC is investigated in this paper. YBSCCO and SDC oxides are synthesized by the sol–gel method. The XRD result reveals that no obvious chemical reaction occurs after sintering the mixture of the YBSCCO and SDC at 850 °C for 20 h. The thermal expansion behavior shows that the YBSCCO–xSDC composite cathode has the suitable TEC values (13.3–11.2 × 10−6 K−1) for the common electrolyte. In different proportions of the composite cathode, YBSCCO–30SDC shows the lowest polarization resistance values, which are only about 0.022 Ω cm2 at 850 °C and 0.034 Ω cm2 at 800 °C. The electrolyte-supported single cell using YBSCCO–30SDC cathode is fabricated, and the peak power densities values are 567 and 432 mW cm−2 at 850 and 800 °C, respectively.
Highlights
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Layered-perovskite YBSCCO cathode is prepared by a sol–gel method.
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The YBa0.5Sr0.5Co1.4Cu0.6O5+δ(YBSCCO)–Sm0.2Ce0.8O1.9(SDC) composites are evaluated as cathodes for SOFC.
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The TEC values of YBSCCO–SDC composite cathodes are decreased with SDC addition.
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The addition of SDC to YBSCCO cathode reduces the polarization resistance.
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High power density of 567 mW cm−2 at 850 °C for YBSCCO–30SDC is obtained.
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Acknowledgements
This work was supported by the Natural Science Foundation of China (nos 51902126 and 61705079), Program for the development of Science and Technology of Jilin province (20180414008GH, 20190701021GH, 20190103039JH, and 20180520182JH), and Open Project of Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University (no. 2016002).
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Liu, M., Fu, X., Meng, X. et al. Enhanced electrochemical performance of the YBa0.5Sr0.5Co1.4Cu0.6O5+δ cathode material by Sm0.2Ce0.8O1.9 incorporation for solid oxide fuel cells application. J Sol-Gel Sci Technol 96, 742–752 (2020). https://doi.org/10.1007/s10971-020-05409-6
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DOI: https://doi.org/10.1007/s10971-020-05409-6