Oxide Ion Conductivity of LaNi0.6Fe0.4O3

被引：19
|
作者：
Nishi, M. [1 ]
Horita, T. [1 ]
Yamaji, K. [1 ]
Yokokawa, H. [1 ]
Shimonosono, T. [1 ]
Kishimoto, H. [1 ]
Brito, M. E. [1 ]
Cho, D. [1 ]
Wang, F. [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan
来源：
IONIC AND MIXED CONDUCTING CERAMICS 8 | 2012年 / 45卷 / 01期
关键词：
CATHODE MATERIAL; FUEL-CELLS;
D O I：
10.1149/1.3701306
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The oxide ion conductivity of LaNi0.6Fe0.4O3 (LNF) was studied by oxygen isotope exchange measurement and SIMS at 673 similar to 1073K in p(O-2) = 0.4 similar to 20 kPa. Oxygen tracer diffusion coefficients (D*) and the surface exchange rates (k) obtained were 4.3 x 10(-9) cm(2)/s and 8.6 x 10(-6) cm/s respectively at 1073 K in p(O-2) = 20 kPa. The activation energy (E-a) for D* was obtained as 152 kJ/mol. D* and E-a for D* of LNF are very close to those of La0.6Sr0.4Co0.8Fe0.2O3 (LSCF). Additionally, oxygen vacancy content in LNF lattice is estimated which are much less than that of LSCF. Possible mechanism of oxide ion conductivity/diffusivity in LNF is discussed according to the present results.
引用
收藏
页码：171 / 180
页数：10
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