Mechanically alloyed MmNi5-type materials for metal hydride electrodes

被引：29
|
作者：
Jurczyk, M
Rajewski, W
Majchrzycki, W
Wójcik, G
机构：
[1] Poznan Univ Technol, Inst Mat Sci & Engn, PL-60965 Poznan, Poland
[2] Cent Lab Batteries & Cells, PL-61362 Poznan, Poland
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 290卷 / 1-2期
关键词：
rare earth nickel compounds; mechanical alloying; nanostructure; electrochemical properties; metal hydride electrode;
D O I：
10.1016/S0925-8388(99)00202-9
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：
Nanocrystalline MmNi(5)-type alloys have been prepared by mechanical alloying (MA) followed by annealing. The structural and electrochemical properties of these materials have been investigated at room temperature. The amorphous phase forms directly from the starting mixture of the elements, without other phase formation. Heating the MA powders at 1070 K for 1 h resulted in the formation of the hexagonal CaCu5-type structure. For nanocrystalline MmNi(4.2)Al(0.8) material discharge capacities of 207 mAh g(-1) were obtained. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：262 / 266
页数：5
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