Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7727329 | Journal of Power Sources | 2016 | 7 Pages |
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-μm-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 mW cmâ2 at 600 °C, with an open circuit voltage close to 1 V. Electrochemical impedance spectra analysis is conducted to evaluate the performance of the fuel cell components in relation with the microstructure of the spin-coated layers.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Hyun Joong Kim, Manjin Kim, Ke Chean Neoh, Gwon Deok Han, Kiho Bae, Jong Mok Shin, Gyu-Tae Kim, Joon Hyung Shim,