Stability and performance of infiltrated La0.8Sr0.2CoxFe1-xO3 electrodes with and without Sm0.2Ce0.8O1.9 interlayers

被引：54
|
作者：
Adijanto, L. [1 ]
Kuengas, R. [1 ]
Bidrawn, F. [1 ]
Gorte, R. J. [1 ]
Vohs, J. M. [1 ]
机构：
[1] Univ Penn, Dept Chem & Biomol Engn, Philadelphia, PA 19104 USA
来源：
JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 14期
关键词：
Solid oxide fuel cells; Cathode deactivation; Yttria-stabilized zirconia; Lanthanum strontium cobalt ferrite; Ceria; OXIDE FUEL-CELLS; CATHODE MATERIALS; CEO2; INTERLAYER; SOFC CATHODES; CONDUCTIVITY; IMPREGNATION; COMPOSITES;
D O I：
10.1016/j.jpowsour.2011.03.022
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 chemical stability of composite electrodes produced by the infiltration of La0.8Sr0.2CoxFe1-xO3 (LSCF) into a porous yttria-stabilized zirconia (YSZ) scaffold were investigated as a function of the Co:Fe ratio in the LSCF and the LSCF calcination temperature. XRD and impedance spectroscopy results indicate that for an LSCF calcination temperature of 1123 K, reactions between the LSCF and YSZ do not occur to a significant extent. Reactions producing La2Zr2O7 and SrZrO3 at the interface were observed, however, for a calcination temperature of 1373 K and x values greater than 0.2. In addition to determining the conditions for which reactions between LSCF and YSZ occur, the effectiveness of infiltrated SDC interlayers in preventing reactions at the LSCF-YSZ interface and their influence on the overall performance of LSCF/YSZ composite electrodes was studied. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：5797 / 5802
页数：6
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