Improvement in the cycle life of LaB5 metal hydride electrodes by addition of ZnO to alkaline electrolyte

被引：10

作者：

Wang, CS

Marrero-Cruz, M

Soriaga, MP

Serafini, D

Srinivasan, S

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA

[2] Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Princeton Univ, Ctr Energy & Environm Studies, Princeton, NJ 08544 USA

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 07期

关键词：

Ni-metal hydride electrodes; Ni-metal hydride batteries; LaB5 metal hydride electrodes LaN3.35Co0.75Mn0.4Al0.3 alloys;

D O I：

10.1016/S0013-4686(01)00801-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The improvement in the cycle life of a metal-hydride electrode, LaNi3.35Co0.75Mn0.4Al0.3, brought about by the addition of ZnO to the alkaline electrolyte has been investigated using measurements based upon in situ electrical resistance. corrosion, scanning electron microscopy. X-ray photoelectron spectroscopy, X-ray diffraction and inductively-coupled plasma-atomic emission spectroscopy. It was found that Zn is underpotentially deposited on and subsequently alloyed with the subject electrode upon repeated charge-and-discharge cycles. The presence of Zn extends the cycle life of the LaNi3.35Co0.75Mn0.4Al0.3 electrode by inhibiting the disintegration and lowering the corrosion rate of the alloy particles. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1069 / 1078

页数：10

共 6 条

[1] IN-SITU X-RAY-ABSORPTION SPECTROSCOPY STUDIES OF METAL HYDRIDE ELECTRODES [J].