High-performance (La,Sr)(Cr,Mn)O3/(Gd,Ce)O2-δ composite anode for direct oxidation of methane

X. J. Chen; Q. L. Liu; K. A. Khor; S. H. Chan

doi:10.1016/j.jpowsour.2006.11.075

High-performance (La,Sr)(Cr,Mn)O₃/(Gd,Ce)O_2-δ composite anode for direct oxidation of methane

X. J. Chen^*, Q. L. Liu, K. A. Khor, S. H. Chan

^*Corresponding author for this work

Nanyang Technological University

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

53 Citations (Scopus)

Abstract

A novel (La,Sr)(Cr,Mn)O₃/(Gd,Ce)O_2-δ (LSCM/GDC) composite electrode is developed and applied as solid oxide fuel cell (SOFC) anode for direct oxidation of methane. The optimum composition of the composite anode is 33 wt.% LSCM and 67 wt.% GDC. At an output current density of 0.5 A cm^-2, the overpotential of the anode in wet H₂ and CH₄ at 850 °C is 0.073 and 0.248 V (i.e., an anodic resistance of 0.146 and 0.496 Ω cm²), respectively. The oxidation of CH₄ on the composite anode is primarily studied by means of electrochemical impedance spectroscopy under different temperatures and a dc bias. The stability of the LSCM/GDC composite anode is evaluated under different current loadings in wet CH₄ at 850 °C for 50 h. The results show that the developed LSCM/GDC composite anode has high stability in CH₄ fuel and possesses good electrochemical performance that is comparable with a Ni cermet anode.

Original language	English
Pages (from-to)	34-40
Number of pages	7
Journal	Journal of Power Sources
Volume	165
Issue number	1
DOIs	https://doi.org/10.1016/j.jpowsour.2006.11.075
Publication status	Published - Feb 25 2007
Externally published	Yes

ASJC Scopus Subject Areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

Keywords

Anode
Electrochemical performance
Methane oxidation
Perovskite
Solid oxide fuel cell
Stability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2006.11.075

Cite this

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title = "High-performance (La,Sr)(Cr,Mn)O3/(Gd,Ce)O2-δ composite anode for direct oxidation of methane",

abstract = "A novel (La,Sr)(Cr,Mn)O3/(Gd,Ce)O2-δ (LSCM/GDC) composite electrode is developed and applied as solid oxide fuel cell (SOFC) anode for direct oxidation of methane. The optimum composition of the composite anode is 33 wt.% LSCM and 67 wt.% GDC. At an output current density of 0.5 A cm-2, the overpotential of the anode in wet H2 and CH4 at 850 °C is 0.073 and 0.248 V (i.e., an anodic resistance of 0.146 and 0.496 Ω cm2), respectively. The oxidation of CH4 on the composite anode is primarily studied by means of electrochemical impedance spectroscopy under different temperatures and a dc bias. The stability of the LSCM/GDC composite anode is evaluated under different current loadings in wet CH4 at 850 °C for 50 h. The results show that the developed LSCM/GDC composite anode has high stability in CH4 fuel and possesses good electrochemical performance that is comparable with a Ni cermet anode.",

keywords = "Anode, Electrochemical performance, Methane oxidation, Perovskite, Solid oxide fuel cell, Stability",

author = "Chen, {X. J.} and Liu, {Q. L.} and Khor, {K. A.} and Chan, {S. H.}",

year = "2007",

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TY - JOUR

T1 - High-performance (La,Sr)(Cr,Mn)O3/(Gd,Ce)O2-δ composite anode for direct oxidation of methane

AU - Chen, X. J.

AU - Liu, Q. L.

AU - Khor, K. A.

AU - Chan, S. H.

PY - 2007/2/25

Y1 - 2007/2/25

N2 - A novel (La,Sr)(Cr,Mn)O3/(Gd,Ce)O2-δ (LSCM/GDC) composite electrode is developed and applied as solid oxide fuel cell (SOFC) anode for direct oxidation of methane. The optimum composition of the composite anode is 33 wt.% LSCM and 67 wt.% GDC. At an output current density of 0.5 A cm-2, the overpotential of the anode in wet H2 and CH4 at 850 °C is 0.073 and 0.248 V (i.e., an anodic resistance of 0.146 and 0.496 Ω cm2), respectively. The oxidation of CH4 on the composite anode is primarily studied by means of electrochemical impedance spectroscopy under different temperatures and a dc bias. The stability of the LSCM/GDC composite anode is evaluated under different current loadings in wet CH4 at 850 °C for 50 h. The results show that the developed LSCM/GDC composite anode has high stability in CH4 fuel and possesses good electrochemical performance that is comparable with a Ni cermet anode.

AB - A novel (La,Sr)(Cr,Mn)O3/(Gd,Ce)O2-δ (LSCM/GDC) composite electrode is developed and applied as solid oxide fuel cell (SOFC) anode for direct oxidation of methane. The optimum composition of the composite anode is 33 wt.% LSCM and 67 wt.% GDC. At an output current density of 0.5 A cm-2, the overpotential of the anode in wet H2 and CH4 at 850 °C is 0.073 and 0.248 V (i.e., an anodic resistance of 0.146 and 0.496 Ω cm2), respectively. The oxidation of CH4 on the composite anode is primarily studied by means of electrochemical impedance spectroscopy under different temperatures and a dc bias. The stability of the LSCM/GDC composite anode is evaluated under different current loadings in wet CH4 at 850 °C for 50 h. The results show that the developed LSCM/GDC composite anode has high stability in CH4 fuel and possesses good electrochemical performance that is comparable with a Ni cermet anode.

KW - Anode

KW - Electrochemical performance

KW - Methane oxidation

KW - Perovskite

KW - Solid oxide fuel cell

KW - Stability

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