Electrochemical properties of LaBaCo2O5+δ-Sm0.2Ce0.8O1.9 composite cathodes for intermediate-temperature solid oxide fuel cells

被引：57
作者：
Gu, Haitao [1 ]
Chen, Han [1 ]
Gao, Ling [1 ]
Guo, Lucun [1 ]
机构：
[1] Nanjing Univ Technol, Coll Mat Sci & Engn, Nanjing 210009, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2009年 / 54卷 / 27期
关键词：
Solid oxide fuel cells; Electrochemical impedance spectroscopy; Composite cathode; Oxygen reduction reaction; Cathodic polarization; OXYGEN REDUCTION REACTION; ELECTRICAL-PROPERTIES; LAYERED PEROVSKITE; PERFORMANCE; SOFC; IMPEDANCE; LNBACO(2)O(5+DELTA); OPTIMIZATION; GDBACO2O5+X;
D O I：
10.1016/j.electacta.2009.07.040
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrochemical properties of LaBaCo2O5+delta-xSm(0.2)Ce(0.8)O(1.9) (LBCO-xSDC, x = 20, 30, 40, 50, 60, wt%) were investigated for the potential application in intermediate-temperature solid oxide fuel cells (IT-SOFCs). The LBCO-50SDC composite cathode exhibited the best electrochemical performance in the LBCO-xSDC cathodes. With x = 50 wt%, the ASR was 1.308 Omega cm(2) at 500 degrees C(0.267 Omega cm(2) at 600 degrees Cand 0.052 Omega cm(2) at 700 degrees C). The maximum of exchange current density i(0) was 0.5630 A cm(2) at 700 degrees C. The improved electrochemical properties of LBCO-50SDC were ascribed to the porous structures of the cathode and more cathode/electrolyte/gas triple phase boundary (TPB) areas. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：7094 / 7098
页数：5
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