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Kim, Guntae
GUNS Lab
Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, metal-air batteries, ceramic membranes, PEMFC

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Enhanced reducibility of ceria-YSZ composites in solid oxide electrodes

Cited 24 times inthomson ciCited 23 times inthomson ci
Title
Enhanced reducibility of ceria-YSZ composites in solid oxide electrodes
Author
Kim, GuntaeVohs, John M.Gorte, R.J.
Keywords
FUEL-CELLS; REDOX PROPERTIES; DOPED CERIA; ZIRCONIA; OXIDATION; STABILITY; FILMS; ALPHA-AL2O3(0001); PERFORMANCE; FABRICATION
Issue Date
2008
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY, v.18, no.20, pp.2386 - 2390
Abstract
Composites prepared by infiltration of 50- wt% ceria into porous YSZ were investigated for use as H2-H2O electrodes for solid oxide electrolyzers (SOE) or fuel cells (SOFC). Cells prepared from these composites showed excellent performance, with SOFC power densities as high as 1.1 W cm -2 at 1073 K. Further investigations into the electrodes showed that they had significantly higher conductivities than would be expect for a material that was only 35 vol% ceria, as high as 0.25 S cm-1 at 1073 in 3% H2O-97% H2 mixtures. An investigation into the thermodynamic redox properties of the composite using coulometric titration at 973 K indicated that the ceria in the composite remained significantly reduced to higher P(O2) compared to pure ceria, probably due to interactions at the ceria-YSZ interface.
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DOI
http://dx.doi.org/10.1039/b718931a
ISSN
0959-9428
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