Effect of half substitution of R (R = Nd, Gd and Er) for Ca on crystal structure and hydrogen storage properties of CaMgNi4

被引：12
|
作者：
Zang, J. H. [1 ]
Zhang, Q. A. [1 ]
Sun, D. L. [2 ]
机构：
[1] Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243002, Anhui, Peoples R China
[2] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 771卷
基金：
中国国家自然科学基金;
关键词：
Laves phase; Crystal structure; Hydrogen absorption and desorption; Electrochemical performance; MG-NI ALLOYS; ELECTROCHEMICAL PROPERTIES; HYDRIDING PROPERTIES; PHASE STRUCTURES; INTERMETALLIC COMPOUNDS; ELECTRODE MATERIALS; KINETIC-PROPERTIES; CO CONTENT; LA; BEHAVIOR;
D O I：
10.1016/j.jallcom.2018.09.009
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：
The effect of half substitution of R (R = Nd, Gd and Er) for Ca in CaMgNi4 compound on crystal structure and hydrogen storage properties was investigated. It was found that R0.5Ca0.5MgNi4 compounds have the C15b-type MgCu4Sn structure. The half substitution leads to the improvement of gaseous hydrogen absorption-desorption thermodynamics. Furthermore, each R0.5Ca0.5MgNi4 alloy electrode shows better cycle stability and high-rate discharge performance than CaMgNi4, especially in the case of half substitution of Nd. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：711 / 720
页数：10
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