Thermodynamic stability maps for the La0.6Sr0.4Co0.2Fe0.8O3±δ-CO2-O2 system for application in solid oxide fuel cells

被引：33

作者：

Darvish, Shadi ^{[1
,2
]}

Gopalan, Srikanth ^{[3
,4
]}

Zhong, Yu ^{[1
,2
]}

机构：

[1] Florida Int Univ, Dept Mech & Mat Engn, Miami, FL 33174 USA

[2] Florida Int Univ, Ctr Study Matter Extreme Condit CeSMEC, Miami, FL 33199 USA

[3] Boston Univ, Div Mat Sci & Engn, Brookline, MA 02446 USA

[4] Boston Univ, Dept Mech Engn, Boston, MA 02215 USA

来源：

JOURNAL OF POWER SOURCES | 2016年 / 336卷

关键词：

Lanthanum strontium cobalt ferrite (LSCF); Solid oxide fuel cell (SOFC); Carbon dioxide; Phase stability; Secondary phases; CALPHAD; LANTHANUM MANGANITE CATHODE; THIN-FILMS; SURFACE SEGREGATION; PERFORMANCE; DEGRADATION; CO2; IMPROVEMENT;

D O I：

10.1016/j.jpowsour.2016.10.004

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：

Thermodynamic and electrochemical predictions on the formation of secondary phases in CO2 containing atmosphere on the La0.6Sr0.4Co0.2Fe0.8O3 +/-delta(LSCF-6428) surface have been carried out utilizing the CALculation of Phase Diagram (CALPHAD) approach. The effect of temperature, CO2 partial pressure, O-2 partial pressure as well as the cathode composition on the formation of secondary phases have been investigated and correlated with the previous investigations in the literature. It is predicted that SrCO3 has the possibility to form on the surface as a result of CO2 exposure to the system. In addition, it is seen that LSCF-6428 experiences higher degradation due to the larger amount of segregated phases than LSM20 at the same operating condition. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：351 / 359

页数：9

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