Triple Phase Boundary Reaction in a Mixed-Conducting SOFC Cathode

被引：10

作者：

Amezawa, K. ^{[1
]}

Fujimaki, Y. ^{[2
]}

Mizuno, K. ^{[2
]}

Kimura, Y. ^{[1
]}

Nakamura, T. ^{[1
]}

Nitta, K. ^{[3
]}

Terada, Y. ^{[3
]}

Iguchi, F. ^{[2
]}

Yashiro, K. ^{[4
]}

Yugami, H. ^{[2
]}

Kawada, T. ^{[4
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Grad Sch Engn, Aoba Ku, 6-6-01 Aramaki Aoba, Sendai, Miyagi 9808579, Japan

[3] Japan Synchrotron Radiat Res Inst, 1-1-1 Koto, Sayo 6795198, Japan

[4] Tohoku Univ, Grad Sch Environm Studies, Aoba Ku, 6-6-01 Aramaki Aoba, Sendai, Miyagi 9808579, Japan

来源：

SOLID-GAS ELECTROCHEMICAL INTERFACES 2 (SGEI 2) | 2017年 / 77卷 / 10期

基金：

日本科学技术振兴机构;

关键词：

D O I：

10.1149/07710.0041ecst

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The contribution of the triple phase boundary reaction in a mixed ionic and electronic conducting (MIEC) cathode in solid oxide fuel cells (SOFCs) was investigated. For this purpose, patterned thin film electrodes with or without triple phase boundaries, which simplified the microstructure of a practical porous electrode, were proposed and fabricated. In this work, an La0.6Sr0.4CoO3-delta (LSC) electrode on a Ce0.9Gd0.1O1.95 electrolyte was chosen as a model SOFC MIEC cathode. Effective reaction area was evaluated by means of operando micro X-ray absorption spectroscopy with the model electrodes under 10(-2) bar of p(O-2) at 873 K. It was found that the introduction of triple phase boundaries shortened the effective reaction area. The results may indicate the non-negligible contribution of the triple phase boundary reaction even in SOFC MIEC cathodes.

引用

页码：41 / 47

页数：7

共 5 条

[1] Electrode kinetics of porous mixed-conducting oxygen electrodes [J].