Dependence of La0.57Sr0.38Co0.2Fe0.8O3-δ cathode degradation rate on electrode thickness

T. Shimura, Y. Komatsu, A. Sciazko, A. He, N. Shikazono

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

Abstract

The degradation factor of the La0.57Sr0.38Co0.2Fe0.8O3-δ (LSCF) cathode is investigated based on the relationship between its electrochemical performance and effective thickness. When the decrease in bulk diffusion coefficient D is assumed as the dominant factor of degradation, the effective thickness of LSCF electrode will decrease. On the other hand, the decrease in surface exchange coefficient k is the dominant factor, effective thickness will increase. From the 100 hrs experiments using LSCF electrodes with various thicknesses, degradation became severe as the LSCF thickness is decreased. This implies that the decrease in k can be the dominant factor in LSCF degradation.

Original languageEnglish
Title of host publicationSolid Oxide Fuel Cells 16, SOFC 2019
EditorsK. Eguchi, S. C. Singhal
PublisherElectrochemical Society Inc.
Pages1273-1277
Number of pages5
Edition1
ISBN (Electronic)9781607688747
DOIs
Publication statusPublished - 2019
Event16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 - Kyoto, Japan
Duration: 2019 Sep 82019 Sep 13

Publication series

NameECS Transactions
Number1
Volume91
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
CountryJapan
CityKyoto
Period19/9/819/9/13

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Shimura, T., Komatsu, Y., Sciazko, A., He, A., & Shikazono, N. (2019). Dependence of La0.57Sr0.38Co0.2Fe0.8O3-δ cathode degradation rate on electrode thickness. In K. Eguchi, & S. C. Singhal (Eds.), Solid Oxide Fuel Cells 16, SOFC 2019 (1 ed., pp. 1273-1277). (ECS Transactions; Vol. 91, No. 1). Electrochemical Society Inc.. https://doi.org/10.1149/09101.1273ecst