Improvement of Plasma Sprayed Yttria Stabilized Zirconia (YSZ) Electrolytes forSolid Oxide Fuel Cells by Spin Coated Sol Gel Solutions

摘要

Yttria stabilized zirconia (YSZ) is the most commonly usedrnelectrolyte material for solid oxide fuel cells (SOFCs), due tornits pure ionic conductivity and chemical stability. Standardrnelectrolyte fabrication techniques for planar fuel cells involvernwet ceramic techniques such as tape-casting or screen printing,rnwhich require sintering at temperatures above 1300oC. Plasmarnspraying (PS) may provide a more rapid and cost efficientrnmethod of producing SOFCs without requiring highrntemperature post-deposition heat treatments. However, it isrndifficult to produce plasma sprayed layers that are both thinrn(<20μm) and completely dense. It is of utmost importance tornhave a dense electrolyte to prevent the mixing of cathode andrnanode reactant gases. This study investigates the use of spinrncoated sol gel derived YSZ precursor solutions to fill the poresrnpresent in plasma sprayed YSZ layers.