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

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

doi:10.1149/09101.1273ecst

Dependence of La_0.57Sr_0.38Co_0.2Fe_0.8O_3-δ cathode degradation rate on electrode thickness

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The degradation factor of the La_0.57Sr_0.38Co_0.2Fe_0.8O_3-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 language	English
Title of host publication	Solid Oxide Fuel Cells 16, SOFC 2019
Editors	K. Eguchi, S. C. Singhal
Publisher	Electrochemical Society Inc.
Pages	1273-1277
Number of pages	5
Edition	1
ISBN (Electronic)	9781607688747, 9781607688747
DOIs	https://doi.org/10.1149/09101.1273ecst
Publication status	Published - 2019
Externally published	Yes
Event	16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 - Kyoto, Japan Duration: 2019 Sept 8 → 2019 Sept 13

Publication series

Name	ECS Transactions
Number	1
Volume	91
ISSN (Print)	1938-6737
ISSN (Electronic)	1938-5862

Conference

Conference	16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
Country/Territory	Japan
City	Kyoto
Period	19/9/8 → 19/9/13

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1149/09101.1273ecst

Cite this

Dependence of La_0.57Sr_0.38Co_0.2Fe_0.8O_3-δ cathode degradation rate on electrode thickness. / Shimura, T.; Komatsu, Y.; Sciazko, A. et al.

Solid Oxide Fuel Cells 16, SOFC 2019. ed. / K. Eguchi; S. C. Singhal. 1. ed. Electrochemical Society Inc., 2019. p. 1273-1277 (ECS Transactions; Vol. 91, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Shimura, T, Komatsu, Y, Sciazko, A, He, A & Shikazono, N 2019, Dependence of La_0.57Sr_0.38Co_0.2Fe_0.8O_3-δ cathode degradation rate on electrode thickness. in K Eguchi & SC Singhal (eds), Solid Oxide Fuel Cells 16, SOFC 2019. 1 edn, ECS Transactions, no. 1, vol. 91, Electrochemical Society Inc., pp. 1273-1277, 16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019, Kyoto, Japan, 19/9/8. https://doi.org/10.1149/09101.1273ecst

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

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.",

author = "T. Shimura and Y. Komatsu and A. Sciazko and A. He and N. Shikazono",

note = "Funding Information: This research was partly supported by NEDO ”Technology Development for Promotion of Applications of Solid Oxide Fuel Cells” project and by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number 18H05887 Publisher Copyright: {\textcopyright} The Electrochemical Society.; 16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 ; Conference date: 08-09-2019 Through 13-09-2019",

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AU - Shikazono, N.

N1 - Funding Information: This research was partly supported by NEDO ”Technology Development for Promotion of Applications of Solid Oxide Fuel Cells” project and by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number 18H05887 Publisher Copyright: © The Electrochemical Society.

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AB - 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.

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