Enhanced performance of LSCF cathode through surface modification

Meilin Liu; Mingfei Liu; Dong Ding; Kevin Blinn; Xiaxi Li; Lifang Nie

doi:10.1016/j.ijhydene.2012.02.139

Enhanced performance of LSCF cathode through surface modification

Meilin Liu, Mingfei Liu, Dong Ding, Kevin Blinn, Xiaxi Li, Lifang Nie

Energy & Environmental Science & Technology

Research output: Contribution to journal › Article › peer-review

187 Scopus citations

Abstract

Mixed ionic-electronic conductors in the family of La _xSr _1-xCo _yFe _1-yO _3-δ (LSCF) have been widely studied as cathode materials for solid oxide fuel cells (SOFCs). However, the long-term stability and the limited surface catalytic activity are still a concern. Here we report a new catalyst La _0.4875Ca _0.0125Ce _0.5O _2-δ (LCC), which can significantly enhance the performance and stability of LSCF cathodes when applied as a thin-film coating on LSCF surface. For example, with 5 μL 0.25 mol L ^-1 LCC solution infiltrated into LSCF cathode, the cathodic polarization resistance was reduced by ∼60% (to ∼0.076 Ω cm ²) at 750°C, leading to a peak power density of ∼1.25 W/cm ², which is ∼18% higher than that for the unmodified LSCF cathode in an anode-supported cell. In addition, stable power output was observed for over 500 h operation at 750°C under a constant voltage of 0.7 V.

Original language	English
Pages (from-to)	8613-8620
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	10
DOIs	https://doi.org/10.1016/j.ijhydene.2012.02.139
State	Published - May 2012

Keywords

LCC catalyst coating
LSCF cathode
SOFC
Stability
Surface enhancement

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10.1016/j.ijhydene.2012.02.139

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@article{f69df48b58df48369bca07449a780751,

title = "Enhanced performance of LSCF cathode through surface modification",

abstract = "Mixed ionic-electronic conductors in the family of La xSr 1-xCo yFe 1-yO 3-δ (LSCF) have been widely studied as cathode materials for solid oxide fuel cells (SOFCs). However, the long-term stability and the limited surface catalytic activity are still a concern. Here we report a new catalyst La 0.4875Ca 0.0125Ce 0.5O 2-δ (LCC), which can significantly enhance the performance and stability of LSCF cathodes when applied as a thin-film coating on LSCF surface. For example, with 5 μL 0.25 mol L -1 LCC solution infiltrated into LSCF cathode, the cathodic polarization resistance was reduced by ∼60% (to ∼0.076 Ω cm 2) at 750°C, leading to a peak power density of ∼1.25 W/cm 2, which is ∼18% higher than that for the unmodified LSCF cathode in an anode-supported cell. In addition, stable power output was observed for over 500 h operation at 750°C under a constant voltage of 0.7 V.",

keywords = "LCC catalyst coating, LSCF cathode, SOFC, Stability, Surface enhancement",

author = "Meilin Liu and Mingfei Liu and Dong Ding and Kevin Blinn and Xiaxi Li and Lifang Nie",

note = "Funding Information: This material is based upon work supported by the Department of Energy, National Energy Technology Laboratory , under Award Number DE-NT0006557 and by the Heterogeneous Functional Materials (HeteroFoaM) Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science , Office of Basic Energy Sciences under Award Number DE-SC0001061 . Partial support of the WCU program at UNIST, South Korea, is also acknowledged.",

year = "2012",

month = may,

doi = "10.1016/j.ijhydene.2012.02.139",

language = "English",

volume = "37",

pages = "8613--8620",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

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TY - JOUR

T1 - Enhanced performance of LSCF cathode through surface modification

AU - Liu, Meilin

AU - Liu, Mingfei

AU - Ding, Dong

AU - Blinn, Kevin

AU - Li, Xiaxi

AU - Nie, Lifang

N1 - Funding Information: This material is based upon work supported by the Department of Energy, National Energy Technology Laboratory , under Award Number DE-NT0006557 and by the Heterogeneous Functional Materials (HeteroFoaM) Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science , Office of Basic Energy Sciences under Award Number DE-SC0001061 . Partial support of the WCU program at UNIST, South Korea, is also acknowledged.

PY - 2012/5

Y1 - 2012/5

N2 - Mixed ionic-electronic conductors in the family of La xSr 1-xCo yFe 1-yO 3-δ (LSCF) have been widely studied as cathode materials for solid oxide fuel cells (SOFCs). However, the long-term stability and the limited surface catalytic activity are still a concern. Here we report a new catalyst La 0.4875Ca 0.0125Ce 0.5O 2-δ (LCC), which can significantly enhance the performance and stability of LSCF cathodes when applied as a thin-film coating on LSCF surface. For example, with 5 μL 0.25 mol L -1 LCC solution infiltrated into LSCF cathode, the cathodic polarization resistance was reduced by ∼60% (to ∼0.076 Ω cm 2) at 750°C, leading to a peak power density of ∼1.25 W/cm 2, which is ∼18% higher than that for the unmodified LSCF cathode in an anode-supported cell. In addition, stable power output was observed for over 500 h operation at 750°C under a constant voltage of 0.7 V.

AB - Mixed ionic-electronic conductors in the family of La xSr 1-xCo yFe 1-yO 3-δ (LSCF) have been widely studied as cathode materials for solid oxide fuel cells (SOFCs). However, the long-term stability and the limited surface catalytic activity are still a concern. Here we report a new catalyst La 0.4875Ca 0.0125Ce 0.5O 2-δ (LCC), which can significantly enhance the performance and stability of LSCF cathodes when applied as a thin-film coating on LSCF surface. For example, with 5 μL 0.25 mol L -1 LCC solution infiltrated into LSCF cathode, the cathodic polarization resistance was reduced by ∼60% (to ∼0.076 Ω cm 2) at 750°C, leading to a peak power density of ∼1.25 W/cm 2, which is ∼18% higher than that for the unmodified LSCF cathode in an anode-supported cell. In addition, stable power output was observed for over 500 h operation at 750°C under a constant voltage of 0.7 V.

KW - LCC catalyst coating

KW - LSCF cathode

KW - SOFC

KW - Stability

KW - Surface enhancement

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ER -

Enhanced performance of LSCF cathode through surface modification

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