Characterization of cation-ordered perovskite oxide LaBaCo2O5+δ as cathode of intermediate-temperature solid oxide fuel cells

被引:75
作者
Pang, Shengli [1 ]
Jiang, Xuening [1 ]
Li, Xiangnan [1 ]
Su, Zhixian [1 ]
Xu, Hongxia [1 ]
Xu, Qiuli [1 ]
Chen, Chonglin [2 ]
机构
[1] Dalian Univ Technol, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China
[2] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78249 USA
关键词
Cation-ordered perovskite; Cathode; Structure; Electrochemical performance; OXYGEN REDUCTION; LNBACO(2)O(5+DELTA); LA0.5BA0.5COO3-DELTA; PERFORMANCE; KINETICS; EXCHANGE;
D O I
10.1016/j.ijhydene.2012.01.056
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
A-site cation-ordered perovskite oxide LaBaCo2O5+delta (LBCO) was synthesized and evaluated as a cathode material of intermediate-temperature solid oxide fuel cells (IT-SOFCs). LBCO was structurally stable when calcined at 850 degrees C in air but transformed into cation-disordered structure at 1050 degrees C. LBCO showed chemical compatibility with Gd0.1Ce0.9O1.95 (GDC) electrolyte at 850 degrees C and 1000 degrees C in air. Conductivity of LBCO firstly increased slightly with higher temperature to a maximum of 470 S cm(-1) at similar to 250 degrees C and then decreased gradually with further increase in temperature. Electrochemical impedance spectra of the LBCO/GDC/LBCO symmetric cell were measured, and electrode reaction mechanism for the LBCO cathode was analyzed. The electrode polarization resistance of LBCO was mainly contributed by oxygen ionic transfer across the cathode/electrolyte interface and oxygen atom diffusion-electronic charge transfer process. Low area-specific resistances with values ranging from 0.15 Omega cm(2) at 650 degrees C to 0.0086 Omega cm(2) at 800 degrees C were obtained. These results have demonstrated that the A-site cation-ordered perovskite oxide LBCO is a promising cathode material for IT-SOFCs. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:6836 / 6843
页数:8
相关论文
共 32 条
  • [1] Mechanisms and rate laws for oxygen exchange on mixed-conducting oxide surfaces
    Adler, S. B.
    Chen, X. Y.
    Wilson, J. R.
    [J]. JOURNAL OF CATALYSIS, 2007, 245 (01) : 91 - 109
  • [2] Electrode kinetics of porous mixed-conducting oxygen electrodes
    Adler, SB
    Lane, JA
    Steele, BCH
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (11) : 3554 - 3564
  • [3] Factors governing oxygen reduction in solid oxide fuel cell cathodes
    Adler, SB
    [J]. CHEMICAL REVIEWS, 2004, 104 (10) : 4791 - 4843
  • [4] Characterization of La0.5Ba0.5CoO3-δ as a SOFC Cathode Material
    Amin, Ruhul
    Karan, Kunal
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2010, 157 (02) : B285 - B291
  • [5] Ba0.5Sr0.5Co0.8Fe0.2O3-δ thin film microelectrodes investigated by impedance spectroscopy
    Baumann, F. S.
    Fleig, J.
    Habermeier, H. -U.
    Maier, J.
    [J]. SOLID STATE IONICS, 2006, 177 (35-36) : 3187 - 3191
  • [6] Intermediate-temperature electrochemical performance of a polycrystalline PrBaCo2O5+δ cathode on samarium-doped ceria electrolyte
    Chen, Dengjie
    Ran, Ran
    Zhang, Kun
    Wang, Jun
    Shao, Zongping
    [J]. JOURNAL OF POWER SOURCES, 2009, 188 (01) : 96 - 105
  • [7] Layered perovskite GdBaCoFeO5+x as cathode for intermediate-temperature solid oxide fuel cells
    Ding, Hanping
    Xue, Xingjian
    [J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2010, 35 (09) : 4316 - 4319
  • [8] A kinetic study of oxygen reduction reaction on La2NiO4 cathodes by means of impedance spectroscopy
    Escudero, M. J.
    Aguadero, A.
    Alonso, J. A.
    Daza, L.
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2007, 611 (1-2) : 107 - 116
  • [9] Tailoring oxygen content on PrBaCo2O5+δ layered cobaltites
    Frontera, C
    Caneiro, A
    Carrillo, AE
    Oró-Solé, J
    García-Muñoz, JL
    [J]. CHEMISTRY OF MATERIALS, 2005, 17 (22) : 5439 - 5445
  • [10] Electrochemical properties of LaBaCo2O5+δ-Sm0.2Ce0.8O1.9 composite cathodes for intermediate-temperature solid oxide fuel cells
    Gu, Haitao
    Chen, Han
    Gao, Ling
    Guo, Lucun
    [J]. ELECTROCHIMICA ACTA, 2009, 54 (27) : 7094 - 7098