Stability of composite cathode consisting of doped bismuth oxide (Y 0.25Bi0.75O1.5) and Conducting Perovskite La1-xSrXMeO3-δ (Me=Mn, Cu)

Kuan Zong Fung, Shu Yi Tsai, Yun Jie Chang, Woochul Jung, Sossina M. Haile

研究成果: Article

1 引文 (Scopus)

摘要

The mixed conducting cathodes for solid oxide fuel cells usually consist of a mixture of oxygen ion conductor and a conducting perovskite oxide. Bismuth oxide based materials are known to exhibit high ionic conductivity. Among them, Y0.25Bi0.75O1.5 (25YSB) is a typical example. On the other hand, La0.8Sr0.2MnO3-δ (20LSM) and La0.75Sr0.25CuO3-δ (25LSCu) are well known cathodes for SOFC applications. In this study, the phase stability of composite cathode consisting of 25LSCu or 20LSM and 25YSB mixed powders was examined. No additional phase other than LSM and YSB was observed at temperatures as high as 1000°C for 8h. However, 25LSCu tends to react with 25YSB and additional phases belonging to La0.3Bi0.7O 1.5, La2CuO4, CuO and Bi2Sr 2CuO6 appeared after heat treatment at 800°C for 20h. The conductivity of 20LSM-25YSB composite electrode increases with increasing volume fraction of 20LSM. The thermal expansion of 20LSM-25YSB composite electrode was also measured as a function of 25YSB content. Based on these results, 20LSM+25YSB is believed to be the desired composite cathode for SOFC application.

原文English
頁(從 - 到)1917-1923
頁數7
期刊ECS Transactions
57
發行號1
DOIs
出版狀態Published - 2013

指紋

Bismuth
Perovskite
Cathodes
Solid oxide fuel cells (SOFC)
Oxides
Composite materials
Electrodes
Phase stability
Ionic conductivity
Thermal expansion
Volume fraction
Heat treatment
Powders
Oxygen
Ions
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

引用此文

@article{9643dcd1f0a14304a708ceed8f2cceb1,
title = "Stability of composite cathode consisting of doped bismuth oxide (Y 0.25Bi0.75O1.5) and Conducting Perovskite La1-xSrXMeO3-δ (Me=Mn, Cu)",
abstract = "The mixed conducting cathodes for solid oxide fuel cells usually consist of a mixture of oxygen ion conductor and a conducting perovskite oxide. Bismuth oxide based materials are known to exhibit high ionic conductivity. Among them, Y0.25Bi0.75O1.5 (25YSB) is a typical example. On the other hand, La0.8Sr0.2MnO3-δ (20LSM) and La0.75Sr0.25CuO3-δ (25LSCu) are well known cathodes for SOFC applications. In this study, the phase stability of composite cathode consisting of 25LSCu or 20LSM and 25YSB mixed powders was examined. No additional phase other than LSM and YSB was observed at temperatures as high as 1000°C for 8h. However, 25LSCu tends to react with 25YSB and additional phases belonging to La0.3Bi0.7O 1.5, La2CuO4, CuO and Bi2Sr 2CuO6 appeared after heat treatment at 800°C for 20h. The conductivity of 20LSM-25YSB composite electrode increases with increasing volume fraction of 20LSM. The thermal expansion of 20LSM-25YSB composite electrode was also measured as a function of 25YSB content. Based on these results, 20LSM+25YSB is believed to be the desired composite cathode for SOFC application.",
author = "Fung, {Kuan Zong} and Tsai, {Shu Yi} and Chang, {Yun Jie} and Woochul Jung and Haile, {Sossina M.}",
year = "2013",
doi = "10.1149/05701.1917ecst",
language = "English",
volume = "57",
pages = "1917--1923",
journal = "ECS Transactions",
issn = "1938-5862",
publisher = "Electrochemical Society, Inc.",
number = "1",

}

TY - JOUR

T1 - Stability of composite cathode consisting of doped bismuth oxide (Y 0.25Bi0.75O1.5) and Conducting Perovskite La1-xSrXMeO3-δ (Me=Mn, Cu)

AU - Fung, Kuan Zong

AU - Tsai, Shu Yi

AU - Chang, Yun Jie

AU - Jung, Woochul

AU - Haile, Sossina M.

PY - 2013

Y1 - 2013

N2 - The mixed conducting cathodes for solid oxide fuel cells usually consist of a mixture of oxygen ion conductor and a conducting perovskite oxide. Bismuth oxide based materials are known to exhibit high ionic conductivity. Among them, Y0.25Bi0.75O1.5 (25YSB) is a typical example. On the other hand, La0.8Sr0.2MnO3-δ (20LSM) and La0.75Sr0.25CuO3-δ (25LSCu) are well known cathodes for SOFC applications. In this study, the phase stability of composite cathode consisting of 25LSCu or 20LSM and 25YSB mixed powders was examined. No additional phase other than LSM and YSB was observed at temperatures as high as 1000°C for 8h. However, 25LSCu tends to react with 25YSB and additional phases belonging to La0.3Bi0.7O 1.5, La2CuO4, CuO and Bi2Sr 2CuO6 appeared after heat treatment at 800°C for 20h. The conductivity of 20LSM-25YSB composite electrode increases with increasing volume fraction of 20LSM. The thermal expansion of 20LSM-25YSB composite electrode was also measured as a function of 25YSB content. Based on these results, 20LSM+25YSB is believed to be the desired composite cathode for SOFC application.

AB - The mixed conducting cathodes for solid oxide fuel cells usually consist of a mixture of oxygen ion conductor and a conducting perovskite oxide. Bismuth oxide based materials are known to exhibit high ionic conductivity. Among them, Y0.25Bi0.75O1.5 (25YSB) is a typical example. On the other hand, La0.8Sr0.2MnO3-δ (20LSM) and La0.75Sr0.25CuO3-δ (25LSCu) are well known cathodes for SOFC applications. In this study, the phase stability of composite cathode consisting of 25LSCu or 20LSM and 25YSB mixed powders was examined. No additional phase other than LSM and YSB was observed at temperatures as high as 1000°C for 8h. However, 25LSCu tends to react with 25YSB and additional phases belonging to La0.3Bi0.7O 1.5, La2CuO4, CuO and Bi2Sr 2CuO6 appeared after heat treatment at 800°C for 20h. The conductivity of 20LSM-25YSB composite electrode increases with increasing volume fraction of 20LSM. The thermal expansion of 20LSM-25YSB composite electrode was also measured as a function of 25YSB content. Based on these results, 20LSM+25YSB is believed to be the desired composite cathode for SOFC application.

UR - http://www.scopus.com/inward/record.url?scp=84905046654&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84905046654&partnerID=8YFLogxK

U2 - 10.1149/05701.1917ecst

DO - 10.1149/05701.1917ecst

M3 - Article

AN - SCOPUS:84905046654

VL - 57

SP - 1917

EP - 1923

JO - ECS Transactions

JF - ECS Transactions

SN - 1938-5862

IS - 1

ER -