DEGRADATION PHENOMENA IN THE CATHODE OF A SOLID OXIDE FUEL-CELL WITH AN ALLOY SEPARATOR

被引：258

作者：

TANIGUCHI, S

KADOWAKI, M

KAWAMURA, H

YASUO, T

AKIYAMA, Y

MIYAKE, Y

SAITOH, T

机构：

[1] New Materials Research Center, SANYO Electric Co., Ltd., Moriguchi City, Osaka, 570

来源：

JOURNAL OF POWER SOURCES | 1995年 / 55卷 / 01期

关键词：

SOLID OXIDE FUEL CELLS; CATHODES; DEGRADATION;

D O I：

10.1016/0378-7753(94)02172-Y

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：

A study is made of the cathode degradation phenomena in a solid oxide fuel cell that uses an alloy separator. Under the action of the discharge current, chromium diffuses from the alloy to the cathode and moves to the cathode/electrolyte interface. The cathode polarization increases in correlation with the intensity of chromium at the cathode/electrolyte interface. The increase in cathode polarization by the discharge current is due to chromium filling the pores at the cathode/electrolyte interface. This restricts diffusion of oxygen gas and decreases the number of electrode reaction sites. Chromium displacement at the cathode/electrolyte interface appears to be caused by the decrease in oxygen activity at the cathode/electrolyte interface.

引用

页码：73 / 79

页数：7