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题名: Effects of Pr3+-deficiency on structure and properties of PrBaCo2O5+delta cathode material-A comparison with Ba2+-deficiency case
作者: Jiang, Xuening1;  Shi, Yuchao1;  Zhou, Wenlong1;  Li, Xiangnan1;  Su, Zhixian1;  Pang, Shengli2;  Jiang, Lei3
关键词: Layered perovskite oxide ;  Pr3+-deficiency ;  Chemical defects ;  Electrical conductivity ;  Electrochemical performance
刊名: JOURNAL OF POWER SOURCES
发表日期: 2014-12-25
DOI: 10.1016/j.jpowsour.2014.08.091
卷: 272, 页:371-377
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: Double-layered perovskite oxides of Pr1-yBaCo2O5+delta (P1-yBCO) with A-site Pr3+-deficiency contents of y = 0.00-0.10 have been studied with respect to phase structures, oxygen content, high-temperature chemical stabilities as well as electrical and electrochemical properties as cathode materials of intermediate-temperature solid oxide fuel cells (IT-SOFCs). The Pr3+-deficiency content in P1-yBCO is limited by similar to 8 mol%, and the Pr3+-deficiency hardly changes lattice parameters of P1-yBCO. Content of oxygen vacancies increases while that of Co4+ decreases with the higher Pr3+-deficiency content. P1-yBCO is chemically stable with the Gd0.1Ce0.9O1.95 (GDC) electrolyte at 1100 degrees C and below in air. Introduction of Pr3+-deficiency decreases electrical conductivities and significantly improves electrochemical performance of P1-yBCO. Among the studied oxides, P0.95BCO with 5 mol% Pr3+-deficiency shows the best electrochemical performance with low ASR values of 0.113 Omega cm(2) at 600 degrees C, 0.054 Omega cm(2) at 650 degrees C and 0.028 Omega cm(2) at 700 degrees C respectively, demonstrating it a promising cathode material of IT-SOFCs. The results of P1-yBCO have also been compared with those of Ba2+-deficient PrBa1-xCO2O5+delta (PB1-xCO, x = 0.00-0.10) oxides and major differences have been found in lattice parameters, oxygen content, chemical defects, electrical conductivities and ASR results. Factors contributing to these differences have been discussed. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: OXIDE FUEL-CELLS ;  LAYERED-PEROVSKITE ;  OXYGEN REDUCTION ;  TEMPERATURE ;  SOFC ;  PERFORMANCE ;  DIFFUSION ;  KINETICS ;  X=0-0.15 ;  GD
语种: 英语
WOS记录号: WOS:000344208700047
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145587
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, Sch Phys & Optoelect Technol, Minist Educ, Key Lab Mat Modificat Laser Ion & Elect Beams, Dalian 116024, Peoples R China
2.Jiangsu Univ, Inst Adv Mat, Zhenjiang 212013, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Jiang, Xuening,Shi, Yuchao,Zhou, Wenlong,et al. Effects of Pr3+-deficiency on structure and properties of PrBaCo2O5+delta cathode material-A comparison with Ba2+-deficiency case[J]. JOURNAL OF POWER SOURCES,2014,272:371-377.
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