Effect of the composition of rare earth on the microstructure and electrochemical properties of RE(NiCoMnAl)5 hydride alloy

被引：0
|
作者：
Ma, JX [1 ]
Pan, HG [1 ]
Chen, CP [1 ]
机构：
[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2002年 / 31卷 / 03期
关键词：
hydrogen storage alloy; AB(5) type hydride alloy; microstructure; electrochemical properties;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, the microstructure and the electrochemical properties of RE(NiCoMnAl)(5) hydride allot with different composition of rare earth have been investigated. The results show that, for all the samples studied, the crystalline structure is CaCu type hexagonal structure and the metallographic structure is dendrite, while, the unit - cell volume decreases after being substituted part La by other rare earth elements. The effect of the composition of rare earth on the electrochemical properties of RE(NiCoMnAl)(5) allot is marked. A compared with La(NiCoMnAl)(5) alloy, the electrochemical capacity of RE(NiCoMnAl)(5) alloy decreases, the high - rate dischargeability improves and the cycling life enhances. where La is pail substituted by others rare earth including Ce, Pr, Nd. The effect of the composition of rare earth on tire electrochemical properties is related to the change of the microstructure of RE(NiCoMnAl)(5) alloy.
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页码：217 / 220
页数：4
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