New Mg-Mn-Ni alloys as efficient hydrogen storage materials

被引：45

作者：

Denys, R. V. ^{[1
]}

Zavaliy, I. Yu ^{[1
]}

Paul-Boncour, V. ^{[2
]}

Berezovets, V. V. ^{[1
]}

Koval'chuk, I. V. ^{[1
]}

Riabov, A. B. ^{[1
]}

机构：

[1] NAS Ukraine, Physicomech Inst, UA-79601 Lvov, Ukraine

[2] CNRS, ICMPE, F-94320 Thiais, France

来源：

INTERMETALLICS | 2010年 / 18卷 / 08期

关键词：

Intermetallics; miscellaneous; Ternary alloy systems; Hydrogen storage; Mechanical alloying and milling; Diffraction; ELECTROCHEMICAL CHARACTERISTICS; MM-NI; HYDRIDES; SYSTEM;

D O I：

10.1016/j.intermet.2010.04.011

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：

New ternary Mg-Mn-Ni alloys synthesised by high energy ball milling have been studied as hydrogen storage materials. A new Mg3MnNi2 ternary intermetallic compound of the Ti2Ni type has been identified, its structure was studied by neutron diffraction. It has been shown that in the Mg-Mn-Ni system this intermetallic coexists with Mg, forming two-phase Mg-Mg3MnNi2 alloys. The Mg3MnNi2 compound reversibly absorbs about 1 wt.% of hydrogen already at room temperature and forms interstitial type Mg3MnNi2H similar to 3 hydride. Substantially higher hydrogenation capacity has been observed in Mg-Mg3MnNi2 alloys with high Mg content, e.g. 5.4 wt.% for the Mg88Mn4Ni8 alloy at 250-350 degrees C. Hydrogen absorption-desorption kinetics of these alloys are drastically improved compared to undoped magnesium due to catalytic effect of the Mg3MnNi2 phase. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1579 / 1585

页数：7

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