Title of article
Evidence of surface-reaction rate limitations in SOFC composite cathodes
Author/Authors
Küngas، نويسنده , , Rainer and Bidrawn، نويسنده , , Fred and Mahmoud، نويسنده , , Eyas and Vohs، نويسنده , , John M. and Gorte، نويسنده , , Raymond J.، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2012
Pages
5
From page
146
To page
150
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 O2 adsorption and incorporation into the perovskite lattice. The impedance of cathodes prepared by infiltration of La0.8Sr0.2FeO3 (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.
Keywords
Infiltration , MODELING , LSF , YSZ , solid oxide fuel cells , cathode
Journal title
Solid State Ionics
Serial Year
2012
Journal title
Solid State Ionics
Record number
1711664
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