Pr掺杂对Ce0.87Sm0.13O2-δ结构及电性能的影响

Pr掺杂对Ce_0.87Sm_0.13O_2-δ结构及电性能的影响

周德凤¹,², 李朝辉¹, 李连贵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）〖HT〗〖JZ)〗

收稿日期:2007-07-25 修回日期:1900-01-01 出版日期:2008-05-26 发布日期:2008-05-26
通讯作者: 周德凤

Effects of Pr Dopant on Structure andElectrical Properties of Ce_0.87Sm_0.13O_2-δ

ZHOU Defeng¹,², LI Zhaohui¹, LI Lian gui¹, MENG Jian²

1. School of Biological Engineering, Changchun University of Technology, Changchun 130012, China； 2. Key Laboratory of Rare Earth Chemistry and Physics, Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Received:2007-07-25 Revised:1900-01-01 Online:2008-05-26 Published:2008-05-26
Contact: ZHOU Defeng

摘要/Abstract

摘要： 采用溶胶凝胶法合成Ce_0.87Sm_0.13-xPr_xO_2-δ(x=0.00, 0.01, 0.02)氧化物, 通过X射线衍射、拉曼光谱、场发射扫描电镜对氧化物进行结构表征, 利用交流阻抗谱测试电性能, 并讨论了掺杂Pr对Ce_0.87Sm_0.13O_2-δ微观结构和电性能的影响. 结果表明，掺入少量Pr³⁺可减少或消除晶粒表面和晶界处的坑痕或孔隙, 增加材料的致密性, 从而降低材料的晶界电阻和电极界面电阻以及晶界电阻在总电阻中所占的比例, 提高了材料的电导率.

关键词: 固体电解质, 电导率, 晶界, 固体氧化物燃料电池

Abstract: Materials formulated Ce_0.87Sm_0.13-xPr_xO_2-δ(x=0.00, 0.01, 0.02) were prepared by solgel method. Structural and electrical properties of the materials were investigated by means of X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM)and AC impedance spectroscopy. The effects of small amounts of Pr doping on microstructure and electrical conductivity of the material were discussed. The results show that the Pr doping could reduce or eliminatethe dents and pores on the grain surface and the grain boundary, which results in the lower electrode interface and grain boundary resistance. The relative density of the materials is increased remarkably. And the contribution of grain boundary resistance to the total resistance is reduced significantly.

Key words: solid state electrolyte, conductivity, grain boundary, solid oxide fuel cell (SOFC)

中图分类号:

O614.111

周德凤,, 李朝辉, 李连贵, 孟健. Pr掺杂对Ce_0.87Sm_0.13O_2-δ结构及电性能的影响[J]. J4, 2008, 46(03): 543-547.

ZHOU Defeng,, LI Zhaohui, LI Lian gui, MENG Jian. Effects of Pr Dopant on Structure andElectrical Properties of Ce_0.87Sm_0.13O_2-δ[J]. J4, 2008, 46(03): 543-547.

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