A niobium and tungsten co-doped SrFeO3-δ perovskite as cathode for intermediate temperature solid oxide fuel cells

被引：76
作者：
Yao, Chuangang [1 ]
Zhang, Haixia [1 ]
Liu, Xiaojuan [2 ]
Meng, Junling [2 ]
Meng, Jian [2 ]
Meng, Fanzhi [3 ]
机构：
[1] Bohai Univ, Sch New Energy, Jinzhou 121007, Peoples R China
[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Jilin, Peoples R China
[3] Changchun Univ Sci & Technol, Sch Mat Sci & Engn, Changchun 130022, Jilin, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2019年 / 45卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Solid oxide fuel cell; Cathode; Perovskite; Co-doped SrFeO3; Electrochemical performance; OXYGEN NONSTOICHIOMETRY; X-RAY; CONDUCTIVITY; MICROSTRUCTURE; PERFORMANCE; ELECTROLYTE; MO;
D O I：
10.1016/j.ceramint.2019.01.019
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nb and W co-doped SrFeO3-delta perovskite SrNb0.1W0.1Fe0.8O3-delta (SNWF) is exploited as a novel cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). SNWF has a cubic structure with Pm 3 m space group. Its thermal, electrical and electrochemical properties were examined in detail. Nb/W co-doping increased the oxygen vacancy density of SNWF in comparison with that of Nb and W single-doped SrNI30.2Fe0.803.6 (SNF) and SrW0.2Fe0.8O3-delta (SWF) perovskites. Nb/W co-doping resulted in the decrease of electrical conductivity and the enhancement of thermal expansion coefficients (TECs) as well as the electrochemical performance. The average TEC value during 30-1000 degrees C is 19.6 x 10(-6) K-1 for SNWF. At 750 degrees C, the area specific resistance (ASR) and the maximum power density are 0.113 Omega cm(2) and 832 mW cm(-2) for the cells based on SNWF electrode and La0.8Sr0.2Ga0.8Mg0.1O3 (LSGM) electrolyte. Good ORR activity and output performance indicate SNWF can be a good alternative cathode material for IT-SOFC.
引用
收藏
页码：7351 / 7358
页数：8
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