YSZ thin films prepared by a novel powder coating process on porous NiO-YSZ cermet

Dense YSZ thin film with a thickness from 2 to 15 mum on porous Ni-YSZ anode support was fabricated by a novel powder coating process. The performance of the cell with a composite of Sm0.8SrCoO3- YSZ (40 wt.%) as cathode was examined over a temperature range from 550 to 800 degreesC, using H-2 -3% H2O as fuel and air as oxidant. The maximum power density of the cells was over 300 mW/cm(2) at 800degreesC. The open circuit voltage of the cells reached 1.1 V at 750 degreesC, illustrating the full dense of the YSZ electrolyte. The anode-electrolyte interfacial resistances were negligible in comparison with that of cathode-electrolyte, indicating the good coherency of the YSZ electrolyte to the anode support. These results demonstrate the reliability of this novel process for thin electrolyte SOFCs.