Development of LSM/YSZ composite cathode for anode-supported solid oxide fuel cells

Y. J. Leng; S. H. Chan; K. A. Khor; S. P. Jiang

doi:10.1023/B:JACH.0000016627.29374.24

Development of LSM/YSZ composite cathode for anode-supported solid oxide fuel cells

Y. J. Leng, S. H. Chan, K. A. Khor, S. P. Jiang

Mechanical Engineering

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

55 Scopus citations

Abstract

This paper presents the effect of (La, Sr)MnO₃ (LSM) stoichiometry on the polarization behaviour of LSM/Y₂O₃-ZrO₂ (YSZ) composite cathodes. The composite cathode made of A-site deficient (La_0.85Sr_0.15)_0.9MnO₃ (LSM-B) showed much lower electrode interfacial resistance and overpotential losses than that made of stoichiometric (La_0.85Sr_0.15)_1.0MnO₃ (LSM-A). The much poorer performance of the latter is believed to be due to the formation of resistive substances such as La₂Zr₂O₇/SrZrO₃ between LSM and YSZ phases in the composite electrode. A slight A-site deficiency (∼0.1) was effective in inhibiting the formation of these resistive substances. A power density of ∼1 W cm^-2 at 800°C was achieved with an anode-supported cell using an LSM-B/YSZ composite cathode. In addition, the effects of cathodic current treatment and electrolyte surface grinding on the performance of composite cathodes were also studied.

Original language	English (US)
Pages (from-to)	409-415
Number of pages	7
Journal	Journal of Applied Electrochemistry
Volume	34
Issue number	4
DOIs	https://doi.org/10.1023/B:JACH.0000016627.29374.24
State	Published - Apr 2004

All Science Journal Classification (ASJC) codes

General Chemical Engineering
Materials Chemistry
Electrochemistry

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title = "Development of LSM/YSZ composite cathode for anode-supported solid oxide fuel cells",

abstract = "This paper presents the effect of (La, Sr)MnO3 (LSM) stoichiometry on the polarization behaviour of LSM/Y2O3-ZrO2 (YSZ) composite cathodes. The composite cathode made of A-site deficient (La0.85Sr0.15)0.9MnO3 (LSM-B) showed much lower electrode interfacial resistance and overpotential losses than that made of stoichiometric (La0.85Sr0.15)1.0MnO3 (LSM-A). The much poorer performance of the latter is believed to be due to the formation of resistive substances such as La2Zr2O7/SrZrO3 between LSM and YSZ phases in the composite electrode. A slight A-site deficiency (∼0.1) was effective in inhibiting the formation of these resistive substances. A power density of ∼1 W cm-2 at 800°C was achieved with an anode-supported cell using an LSM-B/YSZ composite cathode. In addition, the effects of cathodic current treatment and electrolyte surface grinding on the performance of composite cathodes were also studied.",

author = "Leng, {Y. J.} and Chan, {S. H.} and Khor, {K. A.} and Jiang, {S. P.}",

year = "2004",

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T1 - Development of LSM/YSZ composite cathode for anode-supported solid oxide fuel cells

AU - Leng, Y. J.

AU - Chan, S. H.

AU - Khor, K. A.

AU - Jiang, S. P.

PY - 2004/4

Y1 - 2004/4

N2 - This paper presents the effect of (La, Sr)MnO3 (LSM) stoichiometry on the polarization behaviour of LSM/Y2O3-ZrO2 (YSZ) composite cathodes. The composite cathode made of A-site deficient (La0.85Sr0.15)0.9MnO3 (LSM-B) showed much lower electrode interfacial resistance and overpotential losses than that made of stoichiometric (La0.85Sr0.15)1.0MnO3 (LSM-A). The much poorer performance of the latter is believed to be due to the formation of resistive substances such as La2Zr2O7/SrZrO3 between LSM and YSZ phases in the composite electrode. A slight A-site deficiency (∼0.1) was effective in inhibiting the formation of these resistive substances. A power density of ∼1 W cm-2 at 800°C was achieved with an anode-supported cell using an LSM-B/YSZ composite cathode. In addition, the effects of cathodic current treatment and electrolyte surface grinding on the performance of composite cathodes were also studied.

AB - This paper presents the effect of (La, Sr)MnO3 (LSM) stoichiometry on the polarization behaviour of LSM/Y2O3-ZrO2 (YSZ) composite cathodes. The composite cathode made of A-site deficient (La0.85Sr0.15)0.9MnO3 (LSM-B) showed much lower electrode interfacial resistance and overpotential losses than that made of stoichiometric (La0.85Sr0.15)1.0MnO3 (LSM-A). The much poorer performance of the latter is believed to be due to the formation of resistive substances such as La2Zr2O7/SrZrO3 between LSM and YSZ phases in the composite electrode. A slight A-site deficiency (∼0.1) was effective in inhibiting the formation of these resistive substances. A power density of ∼1 W cm-2 at 800°C was achieved with an anode-supported cell using an LSM-B/YSZ composite cathode. In addition, the effects of cathodic current treatment and electrolyte surface grinding on the performance of composite cathodes were also studied.

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JO - Journal of Applied Electrochemistry

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Development of LSM/YSZ composite cathode for anode-supported solid oxide fuel cells

Abstract

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