|About this Abstract
||Materials Science & Technology 2012
||Surface Protection for Enhanced Materials Performance: Science, Technology and Applications
||Doped Solid Oxide Fuel Cell Electrolytes Produced Via a Combination of Suspension Plasma Spray and Very Low Pressure Plasma Spray
||James Fleetwood, Elliott Slamovich, Rodney Trice, Aaron Hall, James McCloskey
|On-Site Speaker (Planned)
Solid oxide fuel cells (SOFCs) are a promising element of comprehensive energy policies due to their direct mechanism for converting the oxidization of fuel, such as hydrogen, into electrical energy. Plasma spray allows deposition of high melting temperature SOFC feedstock on complex surfaces, such as in non-planar SOFC designs. Dense, thin electrolytes of ideal composition for SOFCs can be created by suspension plasma spraying in a very low pressure environment. Compositional control is achieved with dissolved dopant compounds that are incorporated into the coating during spraying. In the work reported, sub-micron 8 mole% Y<SUB>2</SUB>O<SUB>3</SUB>-ZrO<SUB>2</SUB> (YSZ) powders, in suspension with scandium-nitrate dopants, were sprayed on NiO-YSZ anodes, at Sandia National Laboratories’ Thermal Spray Research Laboratory. The chamber was held at 2.4-10 Torr, with the plasma composed of argon, hydrogen, and helium. The resultant electrolytes were 2-10 microns thick. Electrolyte microstructure and performance as part of a SOFC system will be reported.