High thermal stability of three-dimensionally ordered nano-composite cathodes for solid oxide fuel cells

被引：8

作者：

Li, Juan ^{[1
,2
]}

Zhang, Naiqing ^{[2
]}

Sun, Kening ^{[2
]}

Wu, Zhengbin ^{[1
]}

机构：

[1] Chinese Acad Sci, Shenzhen Inst Adv Technol, Elect Vehicle Res & Dev Ctr, Shenzhen 518055, Peoples R China

[2] Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Harbin 150001, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2016年 / 187卷

关键词：

Solid oxide fuel cells; Three-dimensionally ordered architecture; Silica opal; Thermal stability; Oxygen reduction reaction kinetics; PERFORMANCE; FABRICATION; ELECTRODES; REDUCTION; CO;

D O I：

10.1016/j.electacta.2015.11.063

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A non-close-packed (NCP) silica opal connected by cylindrical rods was prepared using a selective etching technique. Using sol-gel impregnation of the NCP silica opal template, La0.8Sr0.2MnO3/Zr0.84Y0.16O2 (LSM/YSZ) composite cathodes were fabricated for solid oxide fuel cells. The microstructure of the as-prepared cathode revealed three-dimensionally (3D) ordered hollow spheres connected by cylindrical tubes. Even after high-temperature sintering at 1000 degrees C, the 3D ordered nano-network remained stable. Electrochemical impedance spectroscopy was used to study the oxygen reduction reaction kinetics of the 3D ordered LSM/YSZ electrode. The impedance behavior was similar to that of a mixed ionic-electronic conductor, different from the behavior of traditional micro-scaled LSM/YSZ electrodes. The nanometer-scale particle size and continuous nano-network are the main reasons for this divergence in behavior. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：179 / 185

页数：7

共 34 条

[31] The stability of LSF-YSZ electrodes prepared by infiltration [J].

Wang, Wensheng ;

Gross, Michael D. ;

Vohs, John M. ;

Gorte, Raymond J. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (05) :B439-B445

[32] Performance degradation of SmBaCo2O5+δ cathode induced by chromium deposition for solid oxide fuel cells [J].

Wei, Bo ;

Chen, Kongfa ;

Wang, Cheng Cheng ;

Lu, Zhe ;

Jiang, San Ping .

ELECTROCHIMICA ACTA, 2015, 174 :327-331

[33] Facile fabrication of a three-dimensional colloidal crystal film with large-area and robust mechanical properties [J].

You, Bo ;

Wen, Nangeng ;

Shi, Lei ;

Wu, Limin ;

Zi, Jian .

JOURNAL OF MATERIALS CHEMISTRY, 2009, 19 (22) :3594-3597

[34] High performance three-dimensionally ordered macroporous composite cathodes for intermediate temperature solid oxide fuel cells [J].

Zhang, Naiqing ;

Li, Juan ;

Li, Wei ;

Ni, Dan ;

Sun, Kening .

RSC ADVANCES, 2012, 2 (03) :802-804

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