Visualization of oxide ionic diffusion at cathode/interlayer/electrolyte interfaces in real flat-tube SOFC cells-stack

被引：4

作者：

Horita, Teruhisa ^{[1
]}

Cho, DoHyung ^{[1
]}

Shimonosono, Taro ^{[1
]}

Kishimoto, Haruo ^{[1
]}

Yamaji, Katsuhiko ^{[1
]}

Brito, Manuel E. ^{[1
]}

Yokokawa, Harumi ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, AIST Cent 5, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2013年 / 121卷 / 1410期

关键词：

SOFCs; Flat-tube; SIMS; O-18; labeling; Oxide ionic flows; LA0.9SR0.1MNO3-X/YTTRIA-STABILIZED ZIRCONIA INTERFACE; YTTRIA-STABILIZED ZIRCONIA; SURFACE EXCHANGE; OXYGEN REDUCTION; SITES;

D O I：

10.2109/jcersj2.121.195

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Local distribution of oxide ionic flows was visualized at the cathode/interlayer/electrolyte interfaces in real flat tube Solid Oxide Fuel Cells (SOFCs) stacks under operating condition. Isotope labeling (O-18 labeling) technique and secondary ion mass spectrometry (SIMS) analysis enabled us to visualize the trace of O-18 diffusion through the (La,Sr)FeO3 cathode/CeO2 interlayer/YSZ electrolyte interfaces in a "frozen state". The difference of O-18 intensity was observed at (La,Sr)FeO3 cathode as well as CeO2 interlayer among different cells. This difference can come from the surface O-16/O-18 exchange rates of (La,Sr)FeO3 cathode and the amounts of O-18(2) supplied to cells. Local difference of O-18 intensity suggested the local distribution of oxide ionic currents at different cells in the stack. (C)2013 The Ceramic Society of Japan. All rights reserved.

引用

页码：195 / 199

页数：5

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