Cathodic reaction mechanism of dense La0.6Sr0.4CoO3 and La0.81Sr0.09MnO3 electrodes for solid oxide fuel cells

被引：98

作者：

Endo, A

Fukunaga, H

Wen, C

Yamada, K

机构：

[1] Univ Tokyo, Sch Engn, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Natl Inst Mat & Chem Res, Dept Chem Syst, Tsukuba, Ibaraki 3058565, Japan

来源：

SOLID STATE IONICS | 2000年 / 135卷 / 1-4期

关键词：

cathodic reaction mechanism; dense electrode; solid oxide fuel cell; LSC; LSM;

D O I：

10.1016/S0167-2738(00)00466-5

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：

Dense La0.6Sr0.4CoO3 (LSC) and La0.81Sr0.09MnO3 (LSM) were prepared by laser ablation on samaria-doped ceria (SDC) and yttria-stabilized zirconia (YSZ) substrates, respectively. The interfacial conductivity of the dense LSM electrodes was independent of the oxygen partial pressure and inversely proportional to the thickness of the LSM film. On the other hand, the interfacial conductivity of the dense LSC electrode was proportional to the square root of the oxygen partial pressure, which indicates the sensitivity of the surface reaction to the overpotential. To determine the origin of the overpotential, we constructed a surface-reaction model. Good agreement was found between our model and experimental results. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：353 / 358

页数：6

共 10 条

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