Micro tubular SOFC single cells with Ce0.9Gd0.1O1.95 (GDC) electrolyte were fabricated by electrophoretic deposition (EPD) process. Stable slurries for the EPD process were produced by adding dispersant of phosphate ester to control the pH, conductivity, and zeta-potential. Anode support, an anode functional layer, and electrolytes were consecutively deposited and co-sintered on a graphite rod by an EPD process. The thickness of the deposited layer increased as the voltage amplitude and the deposition time increased. GDC-based micro tubular single cells with a 10 μm thick electrolyte showed a maximum power density of 0.42 W/cm2 at 600 oC.

Keywords: Solid oxide fuel cells, Micro tubular, Electrophoretic deposition, Slurry, Dispersant