期刊
ELECTROCHIMICA ACTA
卷 75, 期 -, 页码 80-87出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.04.064
关键词
Nickelates; Sol-gel; XPS; Electrochemical impedance spectroscopy; Solid oxide fuel cells
资金
- Algerian government
- French government
A new SOFC cathode material, La1.98NiO4 +/-delta, was tested in presence of two electrolytes, yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC). XRD analysis showed the absence of undesirable phases at the La1.98NiO4 +/-delta/GDC interface, whereas lanthanum zirconate (La2Zr2O7), an insulating phase, is present between electrode La1.98NiO4 +/-delta and YSz electrolyte. XPS analysis showed that the oxygen lattice can be present in form of La-O and LaNiO3, which explains the high conductivity for these materials. At temperatures lower than 650 degrees C, the area specific resistance of the electrodes, measured by electrochemical impedance spectroscopy is significantly inferior when associated to GDC rather than YSZ electrolyte. In addition, in the case of GDC, a lower activation energy of about 0.7 eV was obtained, which could be explained by a higher mobility of oxide ions at the La1.98NiO4 +/-delta/GDC interface compared to the La1.98NiO4 +/-delta/YSZ one. (C) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据