Abstract

The cathode performance is considered as a key factor to enhance the power efficiency and reduce the polarization resistance of intermediate-temperature solid oxide fuel cells. In this work, we report a novel perovskite cathode, YCo0.5Fe0.5O3 (YCF), which was synthesized via electrospinning technique and sol-gel process. SEM and TEM results show that the smooth YCF nanofibers exhibit a uniform diameter of 300 nm after calcination. Electrochemical performance demonstrates a relatively low area-specific resistance of 0.29 Ω×cm2 at 650 °C in air and this value is much lower than that of conventional powder YCF cathode (0.45 Ω cm2). The fuel cells show a high performance of 226 mW cm-2 at 550°C in hydrogen. The results suggest that the YCF nanofiber can be an alternative cathode candidate for intermediate-temperature solid oxide fuel cells.

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