Hydriding properties of nanocrystalline Mg2-xMxNi alloys synthesized by mechanical alloying (M = Mn, Al)

被引:100
|
作者
Gasiorowski, A
Iwasieczko, W
Skoryna, D
Drulis, H
Jurczyk, M
机构
[1] Poznan Tech Univ, Inst Mat Sci & Engn, PL-60695 Poznan, Poland
[2] Polish Acad Sci, Trzebiatowski Inst, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland
关键词
transition metal compounds; hydrogen absorbing materials; mechanical alloying; gas-solid reactions;
D O I
10.1016/S0925-8388(03)00544-9
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 nanocrystalline Mg-based hydrogen storage, Mg2-xMxNi (M = Mn, Al and x = 0, 0.25, 0.5), alloys have been synthesized by mechanical alloying followed by annealing (450degreesC/0.5 h). The structure of these materials have been examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Thermodynamic and electrochemical properties have also been investigated. The hydrogen content of synthesized alloys is decreased compared to Mn-, Al-free Mg2Ni material. On the other hand, substituted nanocrystalline Mg-based alloys show substantially enhanced discharge capacity, at room temperature. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:283 / 288
页数:6
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