Effect of Mg and Sr co-doping on the electrical properties of ceria-based electrolyte materials for intermediate temperature solid oxide fuel cells

被引：41
|
作者：
Jaiswal, Nandini [1 ]
Kumar, Devendra [1 ]
Upadhyay, Shail [2 ]
Parkash, Om [1 ]
机构：
[1] Banaras Hindu Univ, Indian Inst Technol, Dept Ceram Engn, Varanasi 221005, Uttar Pradesh, India
[2] Banaras Hindu Univ, Indian Inst Technol, Dept Appl Phys, Varanasi 221005, Uttar Pradesh, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 577卷
关键词：
Ceramics; Chemical synthesis; Ionic conduction; Impedance spectroscopy; Scanning electron microscope and X-ray diffraction; DOPED CERIA; TRIVALENT CATIONS; MICROSTRUCTURE; CONDUCTIVITY; GD; TRANSPORT; CERAMICS;
D O I：
10.1016/j.jallcom.2013.06.094
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：
Attempts have been made to synthesize a few compositions in the system Ce0.90Mg0.10-xSrxO1.90 (x = 0.00, 0.02, 0.04 and 0.06) by citrate-nitrate auto-combustion method. XRD patterns reveal that all the samples have fluorite crystal structure similar to ceria. Microstructures of samples have been studied by scanning electron microscope. Ionic conductivity of singly doped and co-doped ceria has been investigated as a function of temperature by AC impedance spectroscopy in the temperature range 200-700 degrees C. Impedance plots show a significant decrease in grain boundary resistance after partial substitution of Sr in Mg-doped ceria in the intermediate temperature range. Composition with x = 0.04 shows the highest ionic conductivity (2.0 x 10(-2) S/cm at 700 degrees C) among all the samples studied. (C) 2013 Elsevier B.V. All rights reserved.
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收藏
页码：456 / 462
页数：7
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