Abstract
Spray pyrolysis technique has been applied to deposit thin, dense electrolyte films on porous anode substrates. Thin film deposition using spray pyrolysis involves the spraying of a metal salt solution onto a heated substrate. Two different atomizers were used for generation of aerosol; an electrostatic atomizer and an air blast atomizer. Solutions of yttrium chloride and zirconium acetylacetonate in butyl carbitol and ethanol mixtures were used as precursors. The 8 mol% yttria stabilized zirconia (YSZ) films were deposited on porous NiO-YSZ anode substrates which were heated to temperatures between 280°C and 320°C. Dense, sub-micrometer and crack-free electrolytes on substrates with diameters of up to 35 mm were prepared. Fuel cell tests were performed using dry hydrogen as fuel and air as oxidant. A power output of -550 mW/cm 2 at 770°C was achieved.
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