Studies on Composite Cathode with Nanostructured Ce0.9Sm0.1O1.95 for Intermediate Temperature Solid Oxide Fuel Cells

被引：13

作者：

Xiao, G. ^{[1
]}

Jiang, Z. ^{[2
]}

Li, H. ^{[1
]}

Xia, C. ^{[2
]}

Chen, L. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Univ Sci & Technol China, Hefei 230026, Peoples R China

来源：

FUEL CELLS | 2009年 / 9卷 / 05期

关键词：

Ce0.9Sm0.1O1.95; Intermediate Temperature Solid Oxide Fuel Cell; Mesoporous; Nanostructured; Oxygen reduction; OXYGEN REDUCTION; DOPED CERIA; PERFORMANCE; SOFC; FABRICATION; MECHANISM;

D O I：

10.1002/fuce.200900011

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A kind of nanostructured Ce0.9Sm0.1O1.95 is prepared by a hydrothermal method. It exhibits large Brunauer-Emmett-Teller area (>120 m(2) g(-1)), open mesoporous structure and nanocrystalline sheets. This material shows high activity for oxygen reduction. An area specific resistance below 0.6 Omega cm(2) at 600 degrees C is achieved when it is mixed with Ag paste as a composite cathode in a symmetric cell. This is attributed to its large triple phase boundary area and good ionic conducting property. The influences of microstructure, doping, loading effects of silver nanoparticles and the temperature dependence on oxygen reduction kinetics are investigated by the impedance spectroscopy. Although some further optimisations are still required, this special Ce0.9Sm0.1O1.95 material reported here exhibits pronusing features of applications in the composite electrodes for intermediate temperature solid oxide fuel cells (IT-SOFCs)

引用

页码：650 / 656

页数：7

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