An investigation of LaNi1-xFexO3 as a cathode material for solid oxide fuel cells

被引:291
|
作者
Chiba, R [1 ]
Yoshimura, F [1 ]
Sakurai, Y [1 ]
机构
[1] NTT, Integrated Informat & Energy Syst Labs, Tokai, Ibaraki 3191193, Japan
关键词
conductivity; perovskite; oxide; thermal expansion; SOFC;
D O I
10.1016/S0167-2738(99)00222-2
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
We prepared La(Ni-M)O-3 (M Al, Cr, Mn, Fe, Co, Ga) samples and investigated their characteristics as solid oxide fuel cell (SOFC) cathode materials. We found that the LaNi1-xFeXO3 satisfies the important requirements for a cathode, if x in this system is around 0.4. This system has its highest electronic conductivity of 580 S/cm at 800 degrees C, when x in LaNi1-xFexO3 is 0.4. This value is more than three times higher than that of La0.8Sr0.2MnO3 (180 S/cm). The average thermal expansion coefficient of LaNi0.6Fe0.4O3 from 30 to 1000 degrees C is relatively low (11.4 x 10(-6) K-1) and closer to the 0.92 ZrO2-0.08 Y2O3 (YSZ) value (10.0 x 10(-6) K-1) than La0.8Sr0.2MnO3 (12.0 x 10(-6) K-1). (C) 1999 Published by Elsevier Science B.V. All rights reserved.
引用
收藏
页码:281 / 288
页数:8
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