Geometry dependence of cathode polarization in solid oxide fuel cells investigated by defined Sr-doped LaMnO3 microelectrodes

被引：84

作者：

Brichzin, V ^{[1
]}

Fleig, J ^{[1
]}

Habermeier, HU ^{[1
]}

Maier, J ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2000年 / 3卷 / 09期

关键词：

D O I：

10.1149/1.1391160

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Microcontact impedance spectroscopy was used to measure the electrode polarization resistance of geometrically defined, thin, circular (La0.8Sr0.2)(0.92)MnO3 (LSM) microelectrodes deposited on yttria-stabilized zirconia (YSZ) as a function of the electrode diameter (similar to 20-200 mu m). The electrode polarization resistance is proportional to the inverse of the square of the electrode diameter. This clear result indicates a rate-determining step of the oxygen reduction that is connected with the electrode area rather than depending on the length of the three-phase boundary LSM, O-2/YSZ. (C) 2000 The Electrochemical Society. S1099-0062(00)05-062-8. All rights reserved.

引用

页码：403 / 406

页数：4

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