Slurry spin coating of thin film yttria stabilized zirconia/gadolinia doped ceria bi-layer electrolytes for solid oxide fuel cells
By Hyun Joong Kim and Manjin Kim and Ke Chean Neoh and Gwon Deok Han and Kiho Bae and Jong Mok Shin and Gyu-Tae Kim and Joon Hyung Shim
Published in Journal of Power Sources
2016
Abstract
Thin ceramic bi-layered membrane comprising yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC) is fabricated by the cost-effective slurry spin coating technique, and it is evaluated as an electrolyte of solid oxide fuel cells (SOFCs). It is demonstrated that the slurry spin coating method is capable of fabricating porous ceramic films by adjusting the content of ethyl-cellulose binders in the source slurry. The porous \GDC\ layer deposited by spin coating under an optimal condition functions satisfactorily as a cathode-electrolyte interlayer in the test \SOFC\ stack. A 2-?m-thick electrolyte membrane of the spin-coated YSZ/GDC bi-layer is successfully deposited as a dense and stable film directly on a porous NiO-YSZ anode support without any interlayers, and the \SOFC\ produces power output over 200