Oxygen diffusion and surface exchange in La2-xSrxNiO4+δ
Oxygen diffusion and surface exchange in La2-xSrxNiO4+δ
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DOI：
10.1016/s0167-2738(00)00388-x
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发表时间：
2000-11-01
影响因子：
3.2
通讯作者：
Kilner, JA
中科院分区：
文献类型：
--
作者：
Skinner, SJ;Kilner, JA
化合物 La2-xSrxNiO4+delta, x = 0, 0.1 是在氧过量高达 delta = 0.24 的情况下制备的。采用同位素交换深度剖面法（IEDP）测定了材料的氧示踪扩散系数Md表面交换系数。研究发现La2NiO4+δ的氧扩散率比La0.6Sr0.4Co0.2Fe0.8O3 (LSCF)高，比最好的钙钛矿氧化物离子导体La0.3Sr0.7CoO3 (LSC)低一个数量级。 La2NiO4+δ 的快速氧化物离子扩散及其热稳定性表明该材料将是陶瓷制氧机 (COG) 和固体氧化物燃料电池 (SOFC) 的良好候选材料。此外，通过施主和/或受主掺杂的组合进行优化应该可以改善此处报告的性能。 (C) 2000 Elsevier Science B.V. 保留所有权利。
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.