Degradation mechanism with impurities and life time estimation for SOFCs

T. Horita, D. H. Cho, F. Wang, M. Nishi, T. Shimonosono, H. Kishimoto, K. Yamaji, M. E. Brito, H. Yokokawa

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

2 Citations (Scopus)

Abstract

The degradation of La 0.6Sr 0.4Co 0.2Fe 0.8O 3 (LSCF) cathode performance were investigated under relatively high pressures of impurities with Cr and S. AC impedance and DC currents were measured as a function of operation time. The cathode polarization rapidly increased when exposure to CrO 3 and SO 2 due to active sites vanishing with impurities. The distributions of Cr and S in the porous LSCF were different due to the chemical reactivity and electrochemical effects. A significant amount of SrCrO 4 was deposited at the gas inlet of cathode surface region whereas small spots of SrSO 4 were distributed inside the porous LSCF cathode. From the trends of polarization increase, the decrease trends and life time of cathodes were estimated for the availability of cathodes.

Original languageEnglish
Title of host publicationECS Transactions
Pages297-304
Number of pages8
Volume42
Edition1
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2011 Fuel Cell Seminar and Exposition - Orlando, FL, United States
Duration: 2011 Oct 312011 Nov 3

Other

Other2011 Fuel Cell Seminar and Exposition
CountryUnited States
CityOrlando, FL
Period11/10/3111/11/3

Fingerprint

Solid oxide fuel cells (SOFC)
Cathodes
Impurities
Degradation
Polarization
Chemical reactivity
Availability
Gases

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Horita, T., Cho, D. H., Wang, F., Nishi, M., Shimonosono, T., Kishimoto, H., ... Yokokawa, H. (2012). Degradation mechanism with impurities and life time estimation for SOFCs. In ECS Transactions (1 ed., Vol. 42, pp. 297-304) https://doi.org/10.1149/1.4705506

Degradation mechanism with impurities and life time estimation for SOFCs. / Horita, T.; Cho, D. H.; Wang, F.; Nishi, M.; Shimonosono, T.; Kishimoto, H.; Yamaji, K.; Brito, M. E.; Yokokawa, H.

ECS Transactions. Vol. 42 1. ed. 2012. p. 297-304.

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

Horita, T, Cho, DH, Wang, F, Nishi, M, Shimonosono, T, Kishimoto, H, Yamaji, K, Brito, ME & Yokokawa, H 2012, Degradation mechanism with impurities and life time estimation for SOFCs. in ECS Transactions. 1 edn, vol. 42, pp. 297-304, 2011 Fuel Cell Seminar and Exposition, Orlando, FL, United States, 11/10/31. https://doi.org/10.1149/1.4705506
Horita T, Cho DH, Wang F, Nishi M, Shimonosono T, Kishimoto H et al. Degradation mechanism with impurities and life time estimation for SOFCs. In ECS Transactions. 1 ed. Vol. 42. 2012. p. 297-304 https://doi.org/10.1149/1.4705506
Horita, T. ; Cho, D. H. ; Wang, F. ; Nishi, M. ; Shimonosono, T. ; Kishimoto, H. ; Yamaji, K. ; Brito, M. E. ; Yokokawa, H. / Degradation mechanism with impurities and life time estimation for SOFCs. ECS Transactions. Vol. 42 1. ed. 2012. pp. 297-304
@inproceedings{35be74d7263c405d8048347aa20b6d2f,
title = "Degradation mechanism with impurities and life time estimation for SOFCs",
abstract = "The degradation of La 0.6Sr 0.4Co 0.2Fe 0.8O 3 (LSCF) cathode performance were investigated under relatively high pressures of impurities with Cr and S. AC impedance and DC currents were measured as a function of operation time. The cathode polarization rapidly increased when exposure to CrO 3 and SO 2 due to active sites vanishing with impurities. The distributions of Cr and S in the porous LSCF were different due to the chemical reactivity and electrochemical effects. A significant amount of SrCrO 4 was deposited at the gas inlet of cathode surface region whereas small spots of SrSO 4 were distributed inside the porous LSCF cathode. From the trends of polarization increase, the decrease trends and life time of cathodes were estimated for the availability of cathodes.",
author = "T. Horita and Cho, {D. H.} and F. Wang and M. Nishi and T. Shimonosono and H. Kishimoto and K. Yamaji and Brito, {M. E.} and H. Yokokawa",
year = "2012",
doi = "10.1149/1.4705506",
language = "English",
isbn = "9781566779807",
volume = "42",
pages = "297--304",
booktitle = "ECS Transactions",
edition = "1",

}

TY - GEN

T1 - Degradation mechanism with impurities and life time estimation for SOFCs

AU - Horita, T.

AU - Cho, D. H.

AU - Wang, F.

AU - Nishi, M.

AU - Shimonosono, T.

AU - Kishimoto, H.

AU - Yamaji, K.

AU - Brito, M. E.

AU - Yokokawa, H.

PY - 2012

Y1 - 2012

N2 - The degradation of La 0.6Sr 0.4Co 0.2Fe 0.8O 3 (LSCF) cathode performance were investigated under relatively high pressures of impurities with Cr and S. AC impedance and DC currents were measured as a function of operation time. The cathode polarization rapidly increased when exposure to CrO 3 and SO 2 due to active sites vanishing with impurities. The distributions of Cr and S in the porous LSCF were different due to the chemical reactivity and electrochemical effects. A significant amount of SrCrO 4 was deposited at the gas inlet of cathode surface region whereas small spots of SrSO 4 were distributed inside the porous LSCF cathode. From the trends of polarization increase, the decrease trends and life time of cathodes were estimated for the availability of cathodes.

AB - The degradation of La 0.6Sr 0.4Co 0.2Fe 0.8O 3 (LSCF) cathode performance were investigated under relatively high pressures of impurities with Cr and S. AC impedance and DC currents were measured as a function of operation time. The cathode polarization rapidly increased when exposure to CrO 3 and SO 2 due to active sites vanishing with impurities. The distributions of Cr and S in the porous LSCF were different due to the chemical reactivity and electrochemical effects. A significant amount of SrCrO 4 was deposited at the gas inlet of cathode surface region whereas small spots of SrSO 4 were distributed inside the porous LSCF cathode. From the trends of polarization increase, the decrease trends and life time of cathodes were estimated for the availability of cathodes.

UR - http://www.scopus.com/inward/record.url?scp=84865322819&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865322819&partnerID=8YFLogxK

U2 - 10.1149/1.4705506

DO - 10.1149/1.4705506

M3 - Conference contribution

AN - SCOPUS:84865322819

SN - 9781566779807

VL - 42

SP - 297

EP - 304

BT - ECS Transactions

ER -