The Ca element effect on the enhancement performance of Sr2Fe1.5Mo0.5O6-δ perovskite as cathode for intermediate-temperature solid oxide fuel cells

被引：40
作者：
Qiao, Jinshuo [1 ]
Chen, Wenjun [1 ]
Wang, Wenyi [1 ]
Wang, Zhenhua [1 ,2 ]
Sun, Wang [1 ]
Zhang, Jing [1 ]
Sun, Kening [1 ,2 ]
机构：
[1] Beijing Inst Technol, Sch Chem Engn & Environm, Beijing Key Lab Chem Power Source & Green Catalys, Beijing 100081, Peoples R China
[2] Collaborat Innovat Ctr Elect Vehicles Beijing, 5 Zhongguancun South Ave, Beijing 100081, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2016年 / 331卷
基金：
中国国家自然科学基金;
关键词：
Solid oxide fuel cells; Ca substitution Cathode; Electrochemical properties; THIN-FILM ELECTROLYTE; ELECTROCHEMICAL PROPERTIES; ANODE; SOFCS;
D O I：
10.1016/j.jpowsour.2016.09.082
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：
In this paper, the partial substitution of atomic elements from the A site of a perovskite is investigated in order to develop cathode materials for solid oxide fuel cell (SOFC) applications. Herein, Sr2-xCaxFe1.5Mo0.5O6-delta (SCFM), compounds were investigated by characterizing structural properties, chemical compatibility, electrical properties, electrochemical performance and stability. Thermal expansion coefficients were found to decrease when increasing the Ca content. X-ray photoelectron spectroscopy analysis suggests that Ca doping significantly affects the Fe2+/Fe3+ and Mo6+/Mo5+ ratios. For a doping level of x = 0.4, the sample showed the lowest interface polarization (R-p), the highest conductivity and a maximum power density of 1.26 W cm(-2) at 800 degrees C. These results suggest that SCFM cathode materials are excellent candidates for intermediate temperature solid oxide fuel cells applications. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：400 / 407
页数：8
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