Microstructure and electrochemical properties of La1-xCaxNi3.2Co0.3Al0.3 hydrogen storage electrode alloys

被引：8
|
作者：
Wei, XD [1 ]
Liu, YN [1 ]
Yu, GA [1 ]
Zhu, JW [1 ]
机构：
[1] Xian Jiaotong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 414卷 / 1-2期
关键词：
hydrogen storage electrode alloy; P-C-T curve; discharge capacity; cycle stability;
D O I：
10.1016/j.jallcom.2005.07.013
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：
A new low cobalt hydrogen storage electrode alloys La1-xCaxNi3.2Co0.3Al0.3 (0 <= x <= 0.4) was developed. The microstructure and electrochemical properties were investigated and the results showed that the prepared alloys were basically composed of LaNi5 as matrix phase and LaNi3 as second phase (x <= 0.1). The second phase LaNi3 is substituted by a new phase Al(NiCO)(3) gradually with increasing Ca content, and cycle stability is improved correspondingly. The highest discharge capacity can reach to 295 mAh g(-1) (x = 0.2) and it can remain 82.5% (v = 0.2) after 300 charge/discharge cycles. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：253 / 258
页数：6
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