Effects on the positive electrode of the corrosion of AB5 alloys in nickel-metal-hydride batteries

被引：35
|
作者：
Bernard, P [1 ]
机构：
[1] SAFT, Res Dept, F-91460 Marcoussis, France
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1998年 / 145卷 / 02期
关键词：
D O I：
10.1149/1.1838284
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Effects of corrosion of MmNi(4.3-x)Mn(0.3)Al(0.4)Co(x) alloys are evaluated in nickel-metal-hydride (Ni-MH) cells. Particularly, it is shown how Al released by the corroded alloys pollutes the positive electrode, which endures a loss of charging efficiency, due to the formation of an hydrotalcite-like phase stabilized with Al. Furthermore, since Al is eluted from the hydride electrode and is completely trapped in the positive active material, the titration of this element in the positive electrode is a powerful technique for quantification of the corrosion of AB(5) alloys in Ni-MH cells.
引用
收藏
页码：456 / 458
页数：3
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