Fabrication and Characterization of Anode-supported SDC Film Electrolyte and Its Single Cell

NiO-YSZ (NiO-yttria stabilized zirconia, 3:2, wt.%) and samaria doped ceria (SDC) tapes were prepared by aqueous tape casting. NiO-YSZ anode-supported SDC film electrolyte half-cell was fabricated by laminating and co-sintering at 1400 degrees C for 2 h. The single cell was prepared after LSCF-SDC (lanthanum strontium cobalt ferrite-SDC, 1:1, wt.%) cathode was coated on the electrolyte surface and sintered at 1300 degrees C for 2 h. The discharge performance of the single cell was tested from 500 degrees C to 800 degrees C at different H-2 flow rate. Results showed that the relationship between current (I) of and H-2 flow rate (v) was I = 8 x 10(6) v. Before reaching the threshold value of H-2 flow rate, the current density of single cell increased with the increasing of H-2 flow rate. However, the current density did not change with increasing of H-2 flow rate over the threshold value. The open circuit voltage (OCV) of single cell at 500 degrees C, 600 degrees C, 700 degrees C, 800 degrees C was 0.978, 0.921, 0.861, 0.803 V, respectively. The maximum power density reached 93.03 mW/cm(2) at 800 degrees C. The resistance of interface layer between Ni-YSZ anode and SDC electrolyte was the key impact on the power density.