Symmetrical La0.7Ca0.3Cr0.8Mn0.2O3-δ (LCCM) electrode scaffold-type microtubular solid oxide fuel cells (SOFC) with yttriastabilized zirconia (YSZ) were fabricated via electrophoretic deposition (EPD). Multi-layers of the LCCM-YSZ anode, an YSZ electrolyte, and an LCCM-YSZ cathode were deposited in consecutive order on a graphite rod via EPD. Since both the cathode and anode were used with the same material, a single cell could be obtained by a one-step co-firing processing. While electrical conductivity increased with the amount of phosphate ester (PE) as a charging agent, the pH decreased. The thickness of the YSZ electrolyte layer increased with the applied voltage and deposition time. The maximum power density of the symmetrical microtubular SOFC single cells with the configuration of LCCM-YSZ anode//YSZ electrolyte//LCCM-YSZ cathode was 106 and 141 mW/cm2 at 500 and 600 oC, respectively. After the 10th redox cycle, the single cell exhibited no significant performance degradation.

Keywords: Solid oxide fuel cells, Micro tubular, Electrophoretic deposition,s Symmetrical electrode, Scaffold