Enhanced ceria based electrolytes by codoping samaria and scandia for intermediate temperature solid oxide fuel cells

被引：21
作者：
Gan, Yun [1 ,2 ]
Cheng, Jigui [1 ,2 ]
Li, Mingming [1 ,2 ]
Zhan, Hailin [1 ,2 ]
Sun, Wenzhou [1 ,2 ]
机构：
[1] Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China
[2] Hefei Univ Technol, Key Lab Adv Funct Mat & Devices, Hefei 230009, Anhui, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2015年 / 163卷
基金：
中国博士后科学基金;
关键词：
Ceramics; Electron microscopy; Electrical conductivity; Electrochemical properties; IONIC-CONDUCTIVITY; ELECTRICAL-CONDUCTIVITY; SM3+;
D O I：
10.1016/j.matchemphys.2015.07.041
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, ceria codoped by samaria (Sm2O3) and scandia (Sc2O3) (ScxSm0.2-xCe0.8O1.9, x = 0, 0.01, 0.02, 0.04, 0.06, 0.08, SSDCX) was prepared by the glycine-nitrate method and investigated as candidates for electrolyte materials of intermediate temperature solid oxide fuel cells (IT-SOFCs). The influence of scandia addition on the phase composition, crystalline structure, microstructure, electrical conductivity and chemical stability of the ceria based electrolytes was investigated. Cell performances with Sc0.04Sm0.16Ce0.8O1.9 as electrolytes were also tested and compared with those of cells with Sm0.2Ce0.8O1.9 as electrolytes. The results indicate that ceria codoped with proper amount of Sc2O3 and Sm2O3 have higher electrical conductivity than ceria only doped with Sm2O3. The doping amount of Sc2O3 also has influence on the electrical conductivity of the SSDCX materials, and the highest electrical conductivity of 2.64 x 10(-2) S cm(-1) is achieved for Sc0.04Sm0.16Ce0.8O1.9 materials at 700 degrees C. Single cells with Sc0.04Sm0.16Ce0.8O1.9 as electrolytes demonstrate a maximum power density of 225 mW cm(-2), and an open circuit voltage (OCV) of 0.87 Vat 700 degrees C. Codoping Sc2O3 and Sm2O3 also suppresses the reduction of ceria thus inhibits the drop of OCV under working condition at 700 degrees C. (C) 2015 Published by Elsevier B.V.
引用
收藏
页码：279 / 285
页数：7
相关论文
共 32 条
[1]   Gd/Sm dopant-modified oxidation state and defect generation in nano-ceria [J].
Acharya, S. A. ;
Gaikwad, V. M. ;
D'Souza, S. W. ;
Barman, S. R. .
SOLID STATE IONICS, 2014, 260 :21-29
[2]   Optimization of ionic conductivity in doped ceria [J].
Andersson, DA ;
Simak, SI ;
Skorodumova, NV ;
Abrikosov, IA ;
Johansson, B .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2006, 103 (10) :3518-3521
[3]   Electrical conductivity of the ZrO2-Ln2O3 (Ln = lanthanides) system [J].
Arachi, Y ;
Sakai, H ;
Yamamoto, O ;
Takeda, Y ;
Imanishai, N .
SOLID STATE IONICS, 1999, 121 (1-4) :133-139
[4]   AC-IMPEDANCE STUDIES OF RARE-EARTH-OXIDE DOPED CERIA [J].
BALAZS, GB ;
GLASS, RS .
SOLID STATE IONICS, 1995, 76 (1-2) :155-162
[5]   Oxygen Vacancy Ordering and the Conductivity Maximum in Y2O3-Doped CeO2 [J].
Burbano, Mario ;
Norberg, Stefan T. ;
Hull, Stephen ;
Eriksson, Sten G. ;
Marrocchelli, Dario ;
Madden, Paul A. ;
Watson, Graeme W. .
CHEMISTRY OF MATERIALS, 2012, 24 (01) :222-229
[6]   On the green density, sintering behavior and electrical property of tape cast Ce0.9Gd0.01O1.95 electrolyte films [J].
Cheng, JG ;
Zha, SW ;
Fang, XH ;
Liu, XQ ;
Meng, GY .
MATERIALS RESEARCH BULLETIN, 2002, 37 (15) :2437-2446
[7]   Preparation and characterization of Y2O3-Sm2O3 co-doped ceria electrolyte for IT-SOFCs [J].
Cheng, Jigui ;
Jiang, Qiumei ;
He, Haigen ;
Yang, Junfang ;
Wang, Yifang ;
Gao, Jianfeng .
MATERIALS CHEMISTRY AND PHYSICS, 2011, 125 (03) :704-708
[8]   Hydrothermal synthesis and properties of Ce1-xSmxO2-x/2 and Ce1-xCaxO2-x solid solutions [J].
Huang, W ;
Shuk, P ;
Greenblatt, M .
CHEMISTRY OF MATERIALS, 1997, 9 (10) :2240-2245
[9]   Oxygen vacancy ordering within anion-deficient Ceria [J].
Hull, S. ;
Norberg, S. T. ;
Ahmed, I. ;
Eriksson, S. G. ;
Marrocchelli, D. ;
Madden, P. A. .
JOURNAL OF SOLID STATE CHEMISTRY, 2009, 182 (10) :2815-2821
[10]   Ceria-based solid electrolytes - Review [J].
Inaba, H ;
Tagawa, H .
SOLID STATE IONICS, 1996, 83 (1-2) :1-16
1234