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Scandium-doped PrBaCo2-xScxO6-delta oxides as cathode material for intermediate-temperature solid oxide fuel cells
Li, Xiangnan1; Jiang, Xuening1; Xu, Hongxia1; Xu, Qiuli1; Jiang, Lei2; Shi, Yuchao1; Zhang, Qingyu1
关键词Cathode Sc3++ Doping Oxygen Content Structure Thermal Expansion Performance
刊名INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
2013-09-10
DOI10.1016/j.ijhydene.2013.07.024
38期:27页:12035-12042
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Electrochemistry ; Energy & Fuels
研究领域[WOS]Chemistry ; Electrochemistry ; Energy & Fuels
关键词[WOS]LNBACO(2)O(5+DELTA) ; DIFFUSION ; STABILITY ; ION
英文摘要Scandium-doped PrBaCo2-xScxO6-delta(PBCS-x, x = 0.00-1.00) oxides have been evaluated as cathode materials of intermediate-temperature solid oxide fuel cells (IT-SOFCs) with respect to phase structure, oxygen content, thermal expansion behavior and electrical and electrochemical properties. The XRD results have demonstrated a phase transition in PBCS-x due to Sc3+ doping from tetragonal double-layered perovskite structure at x = 0.00 -0.20, bi-phase mixtures at x = 0.30-0.40, to cubic perovskite structure at x = 0.50-0.90. The oxygen contents (6-delta) and average valences of cobalt ions in PBCS-x decrease with the higher Sc3+ content and increasing temperatures in air. Sc3+ doping has also led to decreased thermal expansion coefficients, lowered electrical conductivities and enhanced electrochemical reaction activities for PBCS-x characterized by decreased area-specific resistances (ASRs) and smaller reaction activation energies. Among the studied samples, the PBCS-0.50 oxide with Sc3+-doping content of x = 0.50 exhibits the best electrochemical performance on Ce0.9Gd0.1O1.95 electrolyte. Its ASR values range from 0.123 Omega cm(2) at 600 degrees C to 0.022 Omega cm(2) at 750 degrees C, which are much lower than the related cathode materials. These results have demonstrated that the PBCS-0.50 oxide is a promising cathode material for IT-SOFCs. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000324563200041
引用统计
被引频次:22[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/137652
专题中国科学院大连化学物理研究所
作者单位1.Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem & Phys, Dalian 116023, Peoples R China
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GB/T 7714
Li, Xiangnan,Jiang, Xuening,Xu, Hongxia,et al. Scandium-doped PrBaCo2-xScxO6-delta oxides as cathode material for intermediate-temperature solid oxide fuel cells[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2013,38(27):12035-12042.
APA Li, Xiangnan.,Jiang, Xuening.,Xu, Hongxia.,Xu, Qiuli.,Jiang, Lei.,...&Zhang, Qingyu.(2013).Scandium-doped PrBaCo2-xScxO6-delta oxides as cathode material for intermediate-temperature solid oxide fuel cells.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,38(27),12035-12042.
MLA Li, Xiangnan,et al."Scandium-doped PrBaCo2-xScxO6-delta oxides as cathode material for intermediate-temperature solid oxide fuel cells".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 38.27(2013):12035-12042.
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