ELECTROCHEMICAL IMPEDANCE SPECTRA AND DETERIORATION MECHANISM OF METAL HYDRIDE ELECTRODES

被引：141

作者：

KURIYAMA, N ^{[1
]}

SAKAI, T ^{[1
]}

MIYAMURA, H ^{[1
]}

UEHARA, I ^{[1
]}

ISHIKAWA, H ^{[1
]}

IWASAKI, T ^{[1
]}

机构：

[1] OSAKA ELECTROCOMMUN UNIV,NEYAGAWA,OSAKA 572,JAPAN

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1992年 / 139卷 / 07期

关键词：

D O I：

10.1149/1.2221180

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical impedance spectrum of a metal hydride electrode was interpreted by an equivalent circuit including a reaction resistance on the alloy surface, a contact resistance between the current collector and the pellet, one related to alloy particle-to-particle contact, and a Warburg impedance. According to the interpretation, deterioration of a metal hydride electrode using copper-coated alloy powder was found to be caused by passivation of the alloy surface only. On the other hand, deterioration of an electrode using uncoated alloy was dominated by increase of the contact resistances.

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页码：L72 / L73

页数：2

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