Fabrication and characterization of t-ZrO2 supported small tubular SOFC

Abstract

Using multi-pass extrusion process, a t-ZrO2 support tube for small tubular solid oxide fuel cell (SOFC) was fabricated. After burning out of extrusion binder, lubricant and pore former, SOFC functional layers have been coated on the tube by slurry dip coating method. The cell configuration was composed of NiO-8YSZ, 8 mol% yttria stabilized zirconia (8YSZ), Gd0.2Ce0.8O1.9-x, (GDC) and La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) on the t-ZrO2 supported tube as anode, electrolyte, interlayer and cathode, respectively. Dense microstructure of electrolyte was achieved by co-sintering. Maximum power density of 349 mW/cm2 was obtained at 850°C using pure H2 as fuel and stagnant air. The cell showed stability for a time period of 100 h at 850°C.