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- Title
Restructuring Porous YSZ by Treatment in Hydrofluoric Acid for Use in SOFC Cathodes.
- Authors
Küngas, Rainer; Ju-Sik Kim; Vohs, John M.; Gorte, Raymond J.
- Abstract
The structure of porous yttria-stabilized zirconia (YSZ) has been modified by infiltration with concentrated hydrofluoric acid for application in solid-oxide fuel cell electrodes. Dissolution and precipitation of the YSZ greatly increased the surface area of the porous YSZ and formed sheets and pillars of YSZ within the structure that were largely stable to calcination at 1373 K. Electrodes made by infiltration of 35 wt% (20 vol%) La0.8Sr0.2 FeO3 into the pore structure exhibited significantly lower impedances at 973 K, even after calcination to 1373 K.
- Subjects
ZIRCONIUM oxide; HYDROFLUORIC acid; SOLID oxide fuel cells; ELECTRODES; POROUS materials
- Publication
Journal of the American Ceramic Society, 2011, Vol 94, Issue 7, p2220
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2010.04359.x