Fabrication and evaluation of anode and thin Y2O3-stabilized ZrO2 film by co-tape casting and co-firing technique

Co-tape casting and co-firing of supporting electrode and electrolyte layers could drastically increase productivity and reduce fabrication cost. In this study, Ni-YSZ anode supporting electrode and the YSZ electrolyte with the size of 6.5 cm x 6.5 cm have been successfully fabricated by co-tape casting and co-firing technique. The cell with 1.5 mm anode and 10 mu m electrolyte is flat without warping, cracks or delaminations. The power density reaches 661, 856, 1085 mW cm(-2) at 0.7 V and 750, 800 and 850 degrees C, respectively. The EIS results demonstrate that the cathodic electrochemical resistance is 0.0680 Omega cm(2) about twice of the anode's which is 0.0359 Omega cm(2). SEM images show the dense YSZ film had a crack free of surface morphology. The anode and cathode layers are well-adhered to the YSZ electrolyte layer. The La-0.8 Sr-0.2 MnO3-delta and particles do not form a continuous network. Optimization of finer cathodic microstructure and anodic porosity are underway.