A study of Pr0.7Sr0.3Fe1-xNixO3-δ as a cathode material for SOFCs with intermediate operating temperature

被引：62

作者：

Hashimoto, SI ^{[1
]}

Kammer, K ^{[1
]}

Larsen, PH ^{[1
]}

Poulsen, FW ^{[1
]}

Mogensen, M ^{[1
]}

机构：

[1] Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark

来源：

SOLID STATE IONICS | 2005年 / 176卷 / 11-12期

关键词：

perovskite; cathode; point electrode; thermal expansion coefficient; conductivity;

D O I：

10.1016/j.ssi.2004.09.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pr0.7Sr0.3Fe1-xNxO3-delta (PSFN; x=0.2-0.5) compounds were synthesized and characterized by powder X-ray diffraction (XRD), thermal expansion coefficient (TEC) measurements, electrical conductivity and electrochemical impedance spectroscopy on cone-shaped electrodes on a Ce0.9Gd0.1O1.95 (CGO10) electrolyte. T he main phase of the powders belongs to the orthorhombic crystal system. The conductivities are fairly high, e.g., around 450 scm(-1) at 600 degrees C for the x=0.3 compound. The TEC of the compounds is close to the values of ceria-based electrolytes PSEN showed hysteresis in the temperature dependence of the conductivity, TEC and area-specific polarization resistance R-pol. It is considered that the hysteresis was caused by relatively slow adjustment of the oxygen stoichiometry. The electrochemical La0.6Sr0.4Fe0.8Co0.2O3-delta. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：1013 / 1020

页数：8

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