Characterization of tantalum doped lanthanum strontium ferrite as cathode materials for solid oxide fuel cells

被引：9
作者：
Sora, Isabella Natali [1 ,2 ]
Felice, Valeria [1 ,2 ]
Zurlo, Francesca [3 ,4 ]
Licoccia, Silvia [3 ,4 ]
Di Bartolomeo, Elisabetta [3 ,4 ]
机构：
[1] Univ Bergamo, INSTM RU Bergamo, I-24044 Dalmine, BG, Italy
[2] Univ Bergamo, Dept Engn & Appl Sci, I-24044 Dalmine, BG, Italy
[3] Univ Roma Tor Vergata, Dept Chem Sci & Technol, I-00133 Rome, Italy
[4] Univ Roma Tor Vergata, NAST Ctr, I-00133 Rome, Italy
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 648卷
关键词：
Tantalum doping; Perovskite structure; Cathode; IT-SOFC; FE; SR; CO;
D O I：
10.1016/j.jallcom.2015.06.005
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 phase relations and crystal structures of La1-xSrxFe1-yTayO3 in the compositional range x = 0-0.60, y = 0-0.20 were investigated by powder X-ray diffraction (XRD). The formal concentration of Fe4+ in the La1-xSrxFe1-yTayO3 +/- w (LSFT) system was calculated and related to the electrical/electrochemical properties. To investigate the electrochemical behaviour as cathode material for SOFCs, impedance measurements were performed on LSFT/electrolyte/LSFT symmetrical cells by using La0.8Sr0.2Ga0.8Mg0.2O3, (LSGM) as electrolyte material. The lowest area specific resistance (ASR), derived from the polarization resistance (R-p), 1 Omega cm(2) at 750 degrees C, was measured for the LSFT compound doped with x = 0.40 and y = 0.05. (C) 2015 Elsevier B.V. All rights reserved.
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页码：154 / 159
页数：6
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