Abstract
High-frequency sonication at 20kHz was employed to coat micro-scale SmxSr1−xCoO3 (SSC) particles with nano-scale Gd2O3-doped CeO2 (GDC) electrolyte materials. The composition-controlled GDC/SSC composite cathodes were evaluated simultaneously using scanning electron microscopy and electrochemical impedance spectroscopy. The microstructurally optimized SSC/GDC cathode composites exhibited minimal electrode polarization compared to the pristine mixed–ionic–electronic conducting SSC materials. The artificially designed micro/nano-composite cathode materials can be employed in intermediate-temperature solid oxide fuel cells.
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