Development of Cr-tolerant cathodes of solid oxide fuel cells

Yongda Zhen; A. I.Y. Tok; F. Y.C. Boey; San Ping Jiang

doi:10.1149/1.2828212

Development of Cr-tolerant cathodes of solid oxide fuel cells

Yongda Zhen
, A. I.Y. Tok
, F. Y.C. Boey
, San Ping Jiang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

44 Citations (Scopus)

Abstract

We have shown that the Cr deposition process at (La, Sr)MnO₃ (LSM) and (La, Sr)(Co,Fe)O₃ (LSCF) cathodes of solid oxide fuel cells (SOFCs) is kinetically limited by the nucleation reaction between the gaseous Cr species and nucleation agents. In the case of the LSM electrode, the nucleation agent has been identified to be manganese species generated under cathodic polarization, and for the LSCF electrode, it is SrO species segregated at the electrode surface. Based on the mechanism proposed, we select La(Ni, Fe)O₃ (LNF) and (La, Ba)(Co,Fe)O₃ (LBCF) perovskites. The results show that LNF and LBCF electrodes are highly tolerant toward the Cr deposition and are much more stable than LSM and LSCF cathodes under SOFC operating conditions in the presence of a Fe-Cr metallic interconnect. © 2008 The Electrochemical Society.

Original language	English
Article number	B42
Journal	Electrochemical and Solid-State Letters
Volume	11
Issue number	3
Online published	8 Jan 2008
DOIs	https://doi.org/10.1149/1.2828212
Publication status	Published - Jan 2008
Externally published	Yes

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SDG 7 Affordable and Clean Energy

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title = "Development of Cr-tolerant cathodes of solid oxide fuel cells",

abstract = "We have shown that the Cr deposition process at (La, Sr)MnO3 (LSM) and (La, Sr)(Co,Fe)O3 (LSCF) cathodes of solid oxide fuel cells (SOFCs) is kinetically limited by the nucleation reaction between the gaseous Cr species and nucleation agents. In the case of the LSM electrode, the nucleation agent has been identified to be manganese species generated under cathodic polarization, and for the LSCF electrode, it is SrO species segregated at the electrode surface. Based on the mechanism proposed, we select La(Ni, Fe)O3 (LNF) and (La, Ba)(Co,Fe)O3 (LBCF) perovskites. The results show that LNF and LBCF electrodes are highly tolerant toward the Cr deposition and are much more stable than LSM and LSCF cathodes under SOFC operating conditions in the presence of a Fe-Cr metallic interconnect. {\textcopyright} 2008 The Electrochemical Society.",

author = "Yongda Zhen and Tok, \{A. I.Y.\} and Boey, \{F. Y.C.\} and Jiang, \{San Ping\}",

year = "2008",

month = jan,

doi = "10.1149/1.2828212",

language = "English",

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journal = "Electrochemical and Solid-State Letters",

issn = "1099-0062",

publisher = "Electrochemical Society Inc.",

number = "3",

}

TY - JOUR

T1 - Development of Cr-tolerant cathodes of solid oxide fuel cells

AU - Zhen, Yongda

AU - Tok, A. I.Y.

AU - Boey, F. Y.C.

AU - Jiang, San Ping

PY - 2008/1

Y1 - 2008/1

N2 - We have shown that the Cr deposition process at (La, Sr)MnO3 (LSM) and (La, Sr)(Co,Fe)O3 (LSCF) cathodes of solid oxide fuel cells (SOFCs) is kinetically limited by the nucleation reaction between the gaseous Cr species and nucleation agents. In the case of the LSM electrode, the nucleation agent has been identified to be manganese species generated under cathodic polarization, and for the LSCF electrode, it is SrO species segregated at the electrode surface. Based on the mechanism proposed, we select La(Ni, Fe)O3 (LNF) and (La, Ba)(Co,Fe)O3 (LBCF) perovskites. The results show that LNF and LBCF electrodes are highly tolerant toward the Cr deposition and are much more stable than LSM and LSCF cathodes under SOFC operating conditions in the presence of a Fe-Cr metallic interconnect. © 2008 The Electrochemical Society.

AB - We have shown that the Cr deposition process at (La, Sr)MnO3 (LSM) and (La, Sr)(Co,Fe)O3 (LSCF) cathodes of solid oxide fuel cells (SOFCs) is kinetically limited by the nucleation reaction between the gaseous Cr species and nucleation agents. In the case of the LSM electrode, the nucleation agent has been identified to be manganese species generated under cathodic polarization, and for the LSCF electrode, it is SrO species segregated at the electrode surface. Based on the mechanism proposed, we select La(Ni, Fe)O3 (LNF) and (La, Ba)(Co,Fe)O3 (LBCF) perovskites. The results show that LNF and LBCF electrodes are highly tolerant toward the Cr deposition and are much more stable than LSM and LSCF cathodes under SOFC operating conditions in the presence of a Fe-Cr metallic interconnect. © 2008 The Electrochemical Society.

UR - https://www.scopus.com/pages/publications/38349086164

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-38349086164&origin=recordpage

U2 - 10.1149/1.2828212

DO - 10.1149/1.2828212

M3 - RGC 21 - Publication in refereed journal

SN - 1099-0062

VL - 11

JO - Electrochemical and Solid-State Letters

JF - Electrochemical and Solid-State Letters

IS - 3

M1 - B42

ER -

Development of Cr-tolerant cathodes of solid oxide fuel cells

Abstract

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