Effects of oxide additions on electrochemical hydriding and dehydriding behavior of Mg2Ni-type hydrogen storage alloy electrode in 6 M KOH solution

被引：55

作者：

Cui, N ^{[1
]}

Luo, JL ^{[1
]}

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada

来源：

ELECTROCHIMICA ACTA | 1998年 / 44卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

hydrogen storage alloy; magnesium alloy; oxide additions; electrode behavior; hydriding and dehydriding; hydrogen diffusion; nickel-metal hydride battery;

D O I：

10.1016/S0013-4686(98)00235-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Effects of metal oxide additions on the electrochemical hydriding and dehydriding behavior of Mg2Ni-type hydrogen storage alloy in 6 M KOH aqueous solution were investigated. The electrode characteristics of mechanically alloyed composites of Mg1.9Y0.1Ni0.9Al0.1-5 wt% MO (MO = Ag2O, Fe2O3, MoO3, RuO2 and V2O5) were examined such as discharge capacity, high-rate dischargability and cycle life. The discharge capacity and high-rate dischargability were greatly increased by the modification with the oxide additions, but the cycle life decreased. The electrochemical performances were characterized using both de polarization and ac impedance analysis techniques. The hydrogen diffusivity in the alloys was estimated by an electrochemical method. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：711 / 720

页数：10

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