Thermal expansion matching of Gd1-xSrxCoO3-δ composite cathodes to Ce0.8Gd0.2O1.95IT-SOFC electrolytes

被引：41

作者：

Dyck, CR ^{[1
]}

Yu, ZB ^{[1
]}

Krstic, V ^{[1
]}

机构：

[1] Queens Univ, Dept Mech Engn, Kingston, ON K7L 3N6, Canada

来源：

SOLID STATE IONICS | 2004年 / 171卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

thermal expansion; IT-SOFC; composite cathode; cobaltite;

D O I：

10.1016/j.ssi.2004.02.014

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：

The thermal expansion match of the Gd1-xSrCoO3-delta system to the Ce0.8Gd0.2O1.95 IT-SOFC electrolyte material was examined for x=0 to 0.5. Thermal expansion was measured using dilatometry and a large mismatch in thermal expansion was found. Electrical conductivity was found to exceed 300 S cm(-1) in all compositions prepared. The Sr content in the Gd1-xSxCoO3-delta perovskite was maintained at x = 0.2 for subsequent thermal matching studies. Ce0.8Gd0.2O1.95 additions to the cobaltite material resulted in stable composite cathode materials that showed little interaction among their constituent phases according to X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. High electrical conductivity was maintained for compositions with excellent thermal expansion matching to the IT-SOFC electrolyte material Ce0.8Gd0.2O1.95. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：17 / 23

页数：7

共 20 条

[1] Characterisation of composite SOFC cathodes using electrochemical impedance spectroscopy. Analysis of Pt/YSZ and LSM/YSZ electrodes [J].

Barbucci, A ;

Bozzo, R ;

Cerisola, G ;

Costamagna, P .

ELECTROCHIMICA ACTA, 2002, 47 (13-14) :2183-2188

[2] PREPARATION OF YBA2CU3O7-DELTA BY CITRATE SYNTHESIS AND PYROLYSIS [J].

BLANK, DHA ;

KRUIDHOF, H ;

FLOKSTRA, J .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1988, 21 (01) :226-227

[3] GLYCINE NITRATE COMBUSTION SYNTHESIS OF OXIDE CERAMIC POWDERS [J].

CHICK, LA ;

PEDERSON, LR ;

MAUPIN, GD ;

BATES, JL ;

THOMAS, LE ;

EXARHOS, GJ .

MATERIALS LETTERS, 1990, 10 (1-2) :6-12

[4] Thermal expansion of Gd-doped ceria and reduced ceria [J].

Hayashi, H ;

Kanoh, M ;

Quan, CJ ;

Inaba, H ;

Wang, SR ;

Dokiya, M ;

Tagawa, H .

SOLID STATE IONICS, 2000, 132 (3-4) :227-233

[5] Characterisation of composite SOFC cathodes using electrochemical impedance spectroscopy [J].

Jorgensen, MJ ;

Primdahl, S ;

Morgensen, M .

ELECTROCHIMICA ACTA, 1999, 44 (24) :4195-4201

[6] THE ELASTIC AND THERMO-ELASTIC PROPERTIES OF COMPOSITE MEDIA [J].

KERNER, EH .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON SECTION B, 1956, 69 (08) :808-813

[7] Oxygen permeability and Faradaic efficiency of Ce0.8Gd0.2O2-δ-La0.7Sr0.3MnO3-δ composites [J].

Kharton, VV ;

Kovalevsky, AV ;

Viskup, AP ;

Figueiredo, FM ;

Yaremchenko, AA ;

Naumovich, EN ;

Marques, FMB .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2001, 21 (10-11) :1763-1767

[8] Ceria-based materials for solid oxide fuel cells [J].

Kharton, VV ;

Figueiredo, FM ;

Navarro, L ;

Naumovich, EN ;

Kovalevsky, AV ;

Yaremchenko, AA ;

Viskup, AP ;

Carneiro, A ;

Marques, FMB ;

Frade, JR .

JOURNAL OF MATERIALS SCIENCE, 2001, 36 (05) :1105-1117

[9] NOTE ON THERMAL EXPANSION AND MICROSTRESSES IN 2-PHASE COMPOSITIONS [J].

KINGERY, WD .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1957, 40 (10) :351-352

[10] The perovskite oxide system Pr1-xSrxCo1-yMnyO3-δ:: Crystal structure and thermal expansion [J].

Kostogloudis, GC ;

Fertis, P ;

Ftikos, C .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1998, 18 (14) :2209-2215

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