Abstract
An analytical model has been developed and experimentally tested to determine the factors that lead to high overpotentials in composite solid oxide fuel cell (SOFC) cathodes. Results suggest that the performance of infiltrated, composite electrodes is limited by O 2 adsorption and incorporation into the perovskite lattice. The impedance of cathodes prepared by infiltration of La 0.8Sr 0.2FeO 3 (LSF) into porous yttria-stabilized zirconia (YSZ) depends strongly on the surface area of the perovskite phase and is independent of LSF film thickness. Model predictions about the effect of the microstructure and ionic conductivity of the porous electrolyte scaffold were also verified.
Original language | English |
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Pages (from-to) | 146-150 |
Number of pages | 5 |
Journal | Solid State Ionics |
Volume | 225 |
DOIs | |
Publication status | Published - Oct 4 2012 |
Externally published | Yes |
Keywords
- Cathode
- Infiltration
- LSF
- Modeling
- Solid oxide fuel cells
- YSZ
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics