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Performance of La0.5Sr0.5Fe0.9Mo0.1O3 − δ–Sm0.2Ce0.8O2 − δ composite cathode for CeO2- and LaGaO3-based solid oxide fuel cells

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Abstract

The La0.5Sr0.5Fe0.9Mo0.1O3 − δ–x wt.% SDC (LSFMo-xSDC, x = 0, 20, and 30) samples were evaluated as potential cathodes for solid oxide fuel cells (SOFCs) based on both La0.9Sr0.1Ga0.8Mg0.2O3 − δ (LSGM) and Sm0.2Ce0.8O2 − δ (SDC) electrolytes. The LSFMo cathode is chemically compatible with the LSGM and SDC electrolytes with temperature up to 1000 °C. Through the comparison of the polarization resistances (Rp) of the LSFMo cathode on LSGM and SDC electrolytes, only a small difference of ~ 13–15% in the Rp was obtained. To further improve the electrochemical performance of the LSFMo cathode, 20 and 30 wt.% SDC were introduced into the LSFMo cathode. The LSGM/SDC-supported single cell with LSFMo-20SDC composite cathode was found to show the optimal performance and excellent power cycle and long-time stability. In addition, the electrical conductivity and thermal expansion coefficient (TEC) for the LSFMo-20SDC cathode were also detected and evaluated. Our results show that the LSFMo-20SDC is a very promising candidate for use in the cathode of SOFC.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 11504320 and 21403101), by the Foundation of Education Department of Liaoning Province (Nos. L2012135, L2016013), by the Foundation of the Science and Technology Department of Liaoning Province (Nos. 2013020151, 201602475, and 20170520381), and by the Program for the Development of Science and Technology of Fushun City (Nos. 20153310 and 20141117).

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  1. College of Science, Yanshan University, Qinhuangdao, Hebei, 066004, People’s Republic of China

    Yuee Chen

  2. College of Science, Liaoning Shihua University, Fushun, Liaoning, 113001, People’s Republic of China

    Leilei Zhang, Chong Wang, Hongdong Cai, Li Wang & Zhaoyuan Song

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  1. Yuee Chen
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  2. Leilei Zhang
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Correspondence to Leilei Zhang.

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Chen, Y., Zhang, L., Wang, C. et al. Performance of La0.5Sr0.5Fe0.9Mo0.1O3 − δ–Sm0.2Ce0.8O2 − δ composite cathode for CeO2- and LaGaO3-based solid oxide fuel cells. Ionics 24, 2717–2728 (2018). https://doi.org/10.1007/s11581-017-2424-z

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