高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

Sm, Pr掺杂CeO2和CeMoO15基固体电解质的结构与性能

周德凤1, 叶俊峰1, 李东风1, 姜新华1, 孟健2   

    1. 长春工业大学生物工程学院, 长春 130012;
    2. 中国科学院长春应用化学研究所稀土化学与物理重点实验室, 长春 130022
  • 收稿日期:2007-06-25 修回日期:1900-01-01 出版日期:2007-11-10 发布日期:2007-11-10
  • 通讯作者: 周德凤

Structure and Electrical Properties of Pr and Sm Doped CeO2 and Ce6MoO15 Based Solid Electrolytes

ZHOU De-Feng1*, YE Jun-Feng1, LI Dong-Feng1, JIANG Xin-Hua1, MENG Jian2   

    1. School of Biological Engineering, Changchun University of Technology, Changchun 130012, China;
    2. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2007-06-25 Revised:1900-01-01 Online:2007-11-10 Published:2007-11-10
  • Contact: ZHOU De-Feng

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摘要： 采用溶胶凝胶法制备了Sm和Pr掺杂的CeO2和CeMoO15基固体电解质, 通过X射线衍射(XRD)、拉曼光谱(Raman)、场发射扫描电镜(FE-SEM)等手段对氧化物结构进行了分析, 用交流阻抗谱测试了其电性能, 并比较了不同基体及其掺杂体系的结构与电性能. 结果表明, Ce6MoO15基掺杂体系的导电性能高于CeO2基掺杂体系; 元素Mo的加入使Ce6MoO15基材料的晶粒尺寸增大, 晶界相成分减少, 材料的晶界电导率增加, 600 ℃以下材料导电性能明显提高; Pr的掺入减小了材料的晶粒尺寸, 提高了材料的晶界电导率.

关键词: 固体电解质, 电导率, 晶界

Abstract: Sm and Pr doped CeO2 and Ce6MoO15 based materials were synthesized by sol-gel method. The structure of the powders were characterized by X-ray diffraction(XRD), Raman spectra, field emission scanning electron microscopy(FE-SEM) and the electrical conductivity of the samples was investigated by AC impedance spectroscopy. By comparing the structure and electrical properties of different systems, it could be concluded that the electrical property of Ce6MoO15 based system is better than that of CeO2 system. The added Mo element resulted in the increase of gain size and improved the grain boundary conductivity notably below 600 ℃, while the Pr dopant induced the smaller grain size and improved the grain boundary conductivity of the materials.

Key words: Solid electrolyte, Conductivity, Grain boundary

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