Abstract
Improved oxygen reduction reaction (ORR) performance of perovskite cathode material is crucial for the widespread utilization and advancement of the intermediate temperature solid oxide fuel cell (IT-SOFC). A composite of Sr2CoNbO6-δ@Sm0.2Ce0.8O2- δ (SCNO@SDC) nanofibers is fabricated using electrospinning, followed by high-temperature sintering process, and its electrochemical activity towards ORR is analyzed. The XRD and STEM confirmed the phase and morphology of the nanofiber composites. Conductivity studies revealed that the activation energy of the nanofiber composite was 0.51 eV lower than that of the conventional composite, which is 0.73 eV. Moreover, the polarization resistance of the nanofiber decreased from 1.38 to 0.345 Ω cm2, whereas that of the conventional electrode decreased from 2.6 to 1.05 Ω cm2 in the air atmosphere between 500°C to 700°C.
Published Version
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