Polarization Resistances of (Ln1-xSrx)CoO3 (Ln=Pr, Nd, Sm, and Gd x=0, 0.3, 0.5, 0.7, and 1) as Cathode Materials for Intermediate Temperature-operating Solid Oxide Fuel Cells

被引：1

作者：

Kim, Jung Hyun ^{[1
]}

Baek, Seung-Wook ^{[1
]}

Bae, Joongmyeon ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mech Engn, Taejon 305701, South Korea

来源：

JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY | 2009年 / 6卷 / 03期

关键词：

cathodes; cerium compounds; cobalt compounds; doping; electrochemical electrodes; gadolinium compounds; neodymium compounds; praseodymium compounds; samarium compounds; solid oxide fuel cells; spectroscopy; strontium compounds; X-ray diffraction; STABILIZED ZIRCONIA; ELECTRODE; PERFORMANCE; TRANSITION;

D O I：

10.1115/1.3006310

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This study focuses on cathode performances of (Ln(1-x)Sr(x))CoO3-delta (Ln=Pr, Nd, Sm, and Gd, x=0, 0.3, 0.5, 0.7, and 1) for intermediate temperature-operating solid oxide fuel cells (IT-SOFCs, 600-800 degrees C). (Ln(1-x)Sr(x))CoO3-delta powders as cathode materials for IT-SOFC, which can be operated between 600 degrees C and 800 degrees C were synthesized by the glycine-nitrate-process (GNP) method. The impedance spectroscopy method was used to investigate area specific resistance (ASR) and electrochemical properties of (Ln(1-x)Sr(x))CoO3-delta (Ln=Pr, Nd, Sm, and Gd, x=0, 0.3, 0.5, 0.7, and 1). Pr0.5Sr0.5CoO3-delta and Pr0.3Sr0.7CoO3-delta showed to 0.15 cm(2) of ASR at 700 degrees C and Nd0.5Sr0.5CoO3-delta to 0.14 cm(2) at 700 degrees C. Sm0.5Sr0.5CoO3-delta showed the lowest ASR values of 0.10 cm(2) on 10% Gd-doped cerium oxide at 700 degrees C.

引用

页码：0345031 / 0345035

页数：5

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