摘要
Due to high ionic conductivity and favorable oxygen electrocatalysis, doped Bi2O3 systems are promising candidates as solid oxide fuel cell cathode materials. Recently, several researchers reported reasonably low cathode polarization resistance by adding electronically conducting materials such as (La,Sr)MnO3 (LSM) or Ag to doped Bi2O3 compositions. Despite extensive research efforts toward maximizing cathode performance, however, the inherent catalytic activity and electrochemical reaction pathways of these promising materials remain largely unknown. Here, we prepare a symmetrical structure with identically sized Y0.5Bi1.5O3/ LSM composite electrodes on both sides of a YSZ electrolyte substrate. AC impedance spectroscopy (ACIS) measurements of electrochemical cells with varied cathode compositions reveal the important role of bismuth oxide phase for oxygen electrocatalysis. These observations aid in directing future research into the reaction pathways and the site-specific electrocatalytic activity as well as giving improved guidance for optimizing SOFC cathode structures with doped Bi2O3 compositions.
| 原文 | English |
|---|---|
| 頁（從 - 到） | 278-282 |
| 頁數 | 5 |
| 期刊 | Journal of the Korean Ceramic Society |
| 卷 | 51 |
| 發行號 | 4 |
| DOIs | |
| 出版狀態 | Published - 2014 七月 31 |
指紋
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
引用此文
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High electrochemical activity of Bi2O3-based composite SOFC cathodes. / Jung, Woo Chul; Chang, Yun Jie; Fung, Kuan Zong; Haile, Sossina.
於: Journal of the Korean Ceramic Society, 卷 51, 編號 4, 31.07.2014, p. 278-282.研究成果: Article
TY - JOUR
T1 - High electrochemical activity of Bi2O3-based composite SOFC cathodes
AU - Jung, Woo Chul
AU - Chang, Yun Jie
AU - Fung, Kuan Zong
AU - Haile, Sossina
PY - 2014/7/31
Y1 - 2014/7/31
N2 - Due to high ionic conductivity and favorable oxygen electrocatalysis, doped Bi2O3 systems are promising candidates as solid oxide fuel cell cathode materials. Recently, several researchers reported reasonably low cathode polarization resistance by adding electronically conducting materials such as (La,Sr)MnO3 (LSM) or Ag to doped Bi2O3 compositions. Despite extensive research efforts toward maximizing cathode performance, however, the inherent catalytic activity and electrochemical reaction pathways of these promising materials remain largely unknown. Here, we prepare a symmetrical structure with identically sized Y0.5Bi1.5O3/ LSM composite electrodes on both sides of a YSZ electrolyte substrate. AC impedance spectroscopy (ACIS) measurements of electrochemical cells with varied cathode compositions reveal the important role of bismuth oxide phase for oxygen electrocatalysis. These observations aid in directing future research into the reaction pathways and the site-specific electrocatalytic activity as well as giving improved guidance for optimizing SOFC cathode structures with doped Bi2O3 compositions.
AB - Due to high ionic conductivity and favorable oxygen electrocatalysis, doped Bi2O3 systems are promising candidates as solid oxide fuel cell cathode materials. Recently, several researchers reported reasonably low cathode polarization resistance by adding electronically conducting materials such as (La,Sr)MnO3 (LSM) or Ag to doped Bi2O3 compositions. Despite extensive research efforts toward maximizing cathode performance, however, the inherent catalytic activity and electrochemical reaction pathways of these promising materials remain largely unknown. Here, we prepare a symmetrical structure with identically sized Y0.5Bi1.5O3/ LSM composite electrodes on both sides of a YSZ electrolyte substrate. AC impedance spectroscopy (ACIS) measurements of electrochemical cells with varied cathode compositions reveal the important role of bismuth oxide phase for oxygen electrocatalysis. These observations aid in directing future research into the reaction pathways and the site-specific electrocatalytic activity as well as giving improved guidance for optimizing SOFC cathode structures with doped Bi2O3 compositions.
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U2 - 10.4191/kcers.2014.51.4.278
DO - 10.4191/kcers.2014.51.4.278
M3 - Article
AN - SCOPUS:84907569512
VL - 51
SP - 278
EP - 282
JO - Journal of the Korean Ceramic Society
JF - Journal of the Korean Ceramic Society
SN - 1229-7801
IS - 4
ER -