Fabrication of a YSZ electrolyte layer via co-pressing/co-sintering for tubular NiO-YSZ anode-supported SOFCs

Abstract

• A simple and effective method to fabricated semi-cells of tubular Ni-YSZ anode-supported electrolyte film is proposed. • The method is the combination of centrifugal deposition, co-pressing and co-sintering techniques. • The YSZ films are dense with the thickness of 21.4∼27.3 μm. A simple and effective method to fabricated semi-cells of tubular NiO-YSZ anode-supported electrolyte film is proposed. This method is the combination of centrifugal deposition technique, cold isostatic co-pressing and co-sintering. The X-ray diffraction patterns showed that the presence of NiO and YSZ, and YSZ grains of electrolyte film grow preferentially on (2 2 0), (3 1 1), (2 2 2), (4 0 0). The YSZ films are dense with the thickness of 21.4∼27.3 μm. At 1400℃, the YSZ crystallite size in the electrolyte film is largest with the size of ∼4.6 μm, which confirms the crystallite growth during co-sintering. The EDX mapping at the same location of EDS further reveals the presence of O, Ni, Y and Zr in the calcined powders.