Oxygen diffusion and surface exchange in La2-xSrxNiO4+δ

被引：526

作者：

Skinner, SJ ^{[1
]}

Kilner, JA ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Ctr Ion Conducting Membranes, Dept Mat, London SW7 2BP, England

来源：

SOLID STATE IONICS | 2000年 / 135卷 / 1-4期

基金：

英国工程与自然科学研究理事会;

关键词：

oxygen diffusion; surface exchange; COGs; SOFCs; La2-xSrxNiO4+delta;

D O I：

10.1016/S0167-2738(00)00388-X

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 compounds La2-xSrxNiO4+delta, x = 0, 0.1, have been prepared with an oxygen excess of up to delta = 0.24. The oxygen tracer diffusion coefficient Md surface exchange coefficient of the materials have been determined by the isotope exchange depth profile method (IEDP). La2NiO4+delta was found to have an oxygen diffusivity higher than that of La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) and one order of magnitude lower than the best perovskite oxide ion conductor La0.3Sr0.7CoO3 (LSC). The fast oxide ion diffusion of La2NiO4+delta combined with its thermal stability indicate that this material would be a good candidate for use in ceramic oxygen generators (COGs) and solid oxide fuel cells (SOFCs). Furthermore, optimisation by a combination of donor and/or acceptor doping should improve the properties reported here. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：709 / 712

页数：4

共 11 条

[1]

BENSON SJ, 1997, 192 M EL SOC PAR P 3, V97

[2] Combination of EBSP measurements and SIMS to study crystallographic orientation dependence of diffusivities in a polycrystalline material: Oxygen tracer diffusion in La2-xSrxCuO4+/-delta [J].