Interaction between La(Sr)FeO3 SOFC cathode and YSZ electrolyte

被引：167

作者：

Simner, SP ^{[1
]}

Shelton, JP ^{[1
]}

Anderson, MD ^{[1
]}

Stevenson, JW ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Mat Sci Div, Richland, WA 99352 USA

来源：

SOLID STATE IONICS | 2003年 / 161卷 / 1-2期

关键词：

YSZ; LSF; electrical conductivity;

D O I：

10.1016/S0167-2738(03)00158-9

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：

Anode-supported yttria-stabilized zirconia (YSZ) solid oxide fuel cells utilizing a Sr-doped LaFeO(3) (LSF) cathode show improved performance with the incorporation of a Sm-doped CeO(2) layer between the cathode and YSZ electrolyte. Detailed Xray diffraction (XRD) analysis of LSF-YSZ reaction mixtures indicates no strontium or lanthanum zirconate formation between these materials even at 1400 degreesC. However, a significant shift in the LSF diffraction peaks is readily apparent and corresponds to a unit cell volume expansion. The most likely scenario for the change in volume is considered to be the incorporation of Zr(4+) cations in the perovskite structure. The presence of the Zr cations subsequently results in reduced electrical conductivity of the cathode, potentially explaining the need for the aforementioned ceria interlayer. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：11 / 18

页数：8

共 13 条

[1]

CARTER JD, 2002, P 2002 FUEL CELL SEM, P874

[2] 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

[3]

FIQUEIREDO FM, 1997, SOLID STATE IONICS, V101, P343

[4]

Kroger F., 1964, CHEM IMPERFECT CRYST, V1st

[5] ELECTRONIC CONDUCTIVITY, SEEBECK COEFFICIENT, AND DEFECT STRUCTURE OF LA1-XSRXFEO3(X=0.1,0.25) [J].

MIZUSAKI, J ;

SASAMOTO, T ;

CANNON, WR ;

BOWEN, HK .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1983, 66 (04) :247-252

[6]

Ralph JM, 2001, ELEC SOC S, V2001, P466

[7] REVISED EFFECTIVE IONIC-RADII AND SYSTEMATIC STUDIES OF INTERATOMIC DISTANCES IN HALIDES AND CHALCOGENIDES [J].

SHANNON, RD .

ACTA CRYSTALLOGRAPHICA SECTION A, 1976, 32 (SEP1) :751-767

[8]

SIMNER JW, 2001, SOFC 7 PV 2001 16 EL, P1051

[9] Optimized lanthanum ferrite-based cathodes for anode-supported SOFCs [J].

Simner, SP ;

Bonnett, JF ;

Canfield, NL ;

Meinhardt, KD ;

Sprenkle, VL ;

Stevenson, JW .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (07) :A173-A175

[10]

SIMNER SP, 2002, P 2002 FUEL CELL SEM, P344

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