The analysis of the two discharge plateaus for Ti-Ni-based metal hydride electrode alloys

被引：19
|
作者：
Xu, YH [1 ]
Chen, CP
Wang, XL
Wang, QD
机构：
[1] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
[2] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2002年 / 112卷 / 01期
关键词：
hydrogen storage alloy; multi-phase composition; Ti-Ni-based alloy; discharge curve; XRD;
D O I：
10.1016/S0378-7753(02)00348-8
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：
In some conditions, the multi-phase composition of the hydrogen storage electrode alloy can be reflected on its discharge curve. In this paper, the discharge curves of the Ti-Ni-based hydrogen storage alloys have be analyzed using electrochemical techniques and XRD. We concluded that the appearance of the two discharge plateaus on the discharge curves of the Ti0.5Al0.25Ni0.25 alloy and Ti3Ni1.7M0.3 (M = Ni, Al, Co, Cr) alloys is related to their multi-phase composition and multi-phase hydride formation. The appearance of the first fastigiated plateau is the result of together releasing hydrogen of TiNi and Ti2Ni phases. The secondary flat plateau represents releasing hydrogen process of only the Ti2Ni phase. (C) 2002 Published by Elsevier Science B.V.
引用
收藏
页码：105 / 108
页数：4
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