Characterization of GdBaCo2O5+δ cathode for IT-SOFCs

被引：88

作者：

Li, Na ^{[1
]}

Lue, Zhe ^{[1
]}

Wei, B. O. ^{[1
]}

Huang, Xiqiang ^{[1
]}

Chen, Kongfa

Zhang, Yaohui ^{[1
]}

Su, Wenhui ^{[1
,2
,3
]}

机构：

[1] Harbin Inst Technol, Ctr Condensed Matter Sci & Technol, Harbin 150001, Peoples R China

[2] Jilin Univ, Dept Phys, Changchun 130023, Peoples R China

[3] Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 454卷 / 1-2期

关键词：

intermediate-temperature SOFCs; mixed ionic-electronic conductor; cathode; GdBaCo2O5+delta;

D O I：

10.1016/j.jallcom.2006.12.017

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：

The mixed conductor GdBaCo2O5+delta (GBCO) was studied as a promising cathode candidate for IT-SOFCs. It exhibited good chemical compatibility with Sm0.2Ce0.8O1.9 (samaria-doped ceria, SDC) electrolyte as proved by XRD results. Its conductivity was about 512-290 S cm(-1) in the temperature range 500-800 degrees C. The thermal expansion coefficient (TEC) was about 20.1 x 10(-6) K-1 between 30 degrees C and 900 degrees C in air, which was similar to other cobaltite perovskite cathodes. The sintering temperature had a strong effect on the electrochemical properties of GBCO. DC polarization and ac impedance spectroscopy results confirmed that 1050 degrees C was the optimum sintering temperature. Polarization resistance values for the GBCO cathode on SDC electrolyte were 0.15 Omega cm(2) at 750 degrees C and 1.11 Omega cm(2) at 600 degrees C, respectively. (c) 2007 Published by Elsevier B.V.

引用

页码：274 / 279

页数：6

共 29 条

[1] Mechanism and kinetics of oxygen reduction on porous La1-xSrxCoO3-δ electrodes [J].

Adler, SB .

SOLID STATE IONICS, 1998, 111 (1-2) :125-134

[2] Electrode kinetics of porous mixed-conducting oxygen electrodes [J].

Adler, SB ;

Lane, JA ;

Steele, BCH .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (11) :3554-3564

[3] Electrical properties of GdBaCo2O5+x for ITSOFC applications [J].

Chang, Aimin ;

Skinner, Stephen J. ;

Kilner, John A. .

SOLID STATE IONICS, 2006, 177 (19-25) :2009-2011

[4] Development of solid-oxide fuel cells that operate at 500°C [J].

Doshi, R ;

Richards, VL ;

Carter, JD ;

Wang, XP ;

Krumpelt, M .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (04) :1273-1278

[5] Reaction model of dense Sm0.5Sr0.5CoO3 as SOFC cathode [J].

Fukunaga, H ;

Koyama, M ;

Takahashi, N ;

Wen, C ;

Yamada, K .

SOLID STATE IONICS, 2000, 132 (3-4) :279-285

[6] Oxide-ion conducting ceramics for solid oxide fuel cells [J].

Huang, K ;

Wan, J ;

Goodenough, JB .

JOURNAL OF MATERIALS SCIENCE, 2001, 36 (05) :1093-1098

[7] Electrochemical performance of LSCF-based composite cathodes for intermediate temperature SOFCs [J].

Hwang, HJ ;

Ji-Woong, MB ;

Seunghun, LA ;

Lee, EA .

JOURNAL OF POWER SOURCES, 2005, 145 (02) :243-248

[8] High-performance electrodes for reduced temperature solid oxide fuel cells with doped lanthanum gallate electrolyte II.: La(Sr)CoO3 cathode [J].

Inagaki, T ;

Miura, K ;

Yoshida, H ;

Maric, R ;

Ohara, S ;

Zhang, X ;

Mukai, K ;

Fukui, T .

JOURNAL OF POWER SOURCES, 2000, 86 (1-2) :347-351

[9] Single intermedium-temperature SOFC prepared by glycine-nitrate process [J].

Ji, Y ;

Liu, J ;

He, TM ;

Cong, LG ;

Wang, JX ;

Su, WH .

JOURNAL OF ALLOYS AND COMPOUNDS, 2003, 353 (1-2) :257-262

[10] Electrode behaviour at (La,Sr)MnO3/Y2O3-ZrO2 interface by electrochemical impedance spectroscopy [J].

Jiang, SP ;

Love, JG ;

Ramprakash, Y .

JOURNAL OF POWER SOURCES, 2002, 110 (01) :201-208

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