Stability and performance of LSCF-infiltrated SOFC cathodes: Effect of nano-particle coarsening

M. Shah*, G. A. Hughes, P. W. Voorhees, S. A. Barnett

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

La 0.6Sr 0.4Fe 0.8CO 0.2O 3-δ - Gd doped Ceria (LSCF-GDC) symmetric cathode cells were electrochemically tested at 600°C, after aging at various times and temperatures ranging from 650-850°C. The observed increases in polarization resistance were fit using a combined surface resistance and power-law coarsening kinetics model. Best fits were obtained for a t 0.25 power law applicable to coarsening of isolated particles on a surface, with a surface diffusion activation energy range of 2.52 to 2.86 eV. The model predicts that the resistance would increase from 0.2 to 0.28-0.35 Ωcm 2 (by 39-74%) over 40,000 h at 600°C, due to coarsening. Additionally, evolution of the infiltrated LSCF particles was seen in SEM images of the same location before and after aging treatment. La 1-xSr xMnO 3-δ (LSM) coarsening was also observed for infiltrated LSM- yttria-stabilized-zirconia (YSZ) cathodes, with a corresponding increase in polarization resistance.

Original languageEnglish (US)
Title of host publicationSolid Oxide Fuel Cells 12, SOFC XII
Pages2045-2053
Number of pages9
Edition3 PART 3
DOIs
StatePublished - Dec 1 2011
Event12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting - Montreal, QC, Canada
Duration: May 1 2011May 6 2011

Publication series

NameECS Transactions
Number3 PART 3
Volume35
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting
CountryCanada
CityMontreal, QC
Period5/1/115/6/11

ASJC Scopus subject areas

  • Engineering(all)

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    Shah, M., Hughes, G. A., Voorhees, P. W., & Barnett, S. A. (2011). Stability and performance of LSCF-infiltrated SOFC cathodes: Effect of nano-particle coarsening. In Solid Oxide Fuel Cells 12, SOFC XII (3 PART 3 ed., pp. 2045-2053). (ECS Transactions; Vol. 35, No. 3 PART 3). https://doi.org/10.1149/1.3570195