Activity and capacity of hydrogen storage alloy Mg2NiH4 produced by hydriding combustion synthesis

被引：36

作者：

Li, LQ

Akiyama, T

Yagi, L

机构：

[1] Univ Osaka Prefecture, Grad Sch, Dept Chem Engn, Osaka 5998531, Japan

[2] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210009, Peoples R China

[3] Tohoku Univ, Inst Adv Mat Proc, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 316卷 / 1-2期

关键词：

hydrogen storage; inter-metallics; miscellaneous; reaction synthesis;

D O I：

10.1016/S0925-8388(00)01286-X

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 high activity and a large capacity of hydrogen storage alloy Mg2NiH4 produced by hydriding combustion synthesis were investigated by means of differential scanning calorimeter (DSC) and pressure-composition isotherms (PCT). The results showed that the product of Mg2NiH4 from the hydriding combustion synthesis has enough activity to the hydriding reaction and the amount of hydrogen absorbed by the product reached the maximum (3.4-3.6%) mass near the theoretical value just after synthesis without any activation process. This kind of activity and capacity of hydrogen storage are not only stable, but also tolerant of high temperature of 850 K. PCT results give some phenomenon of three phases existing in isotherms. The relationships between the equilibrium plateau pressure and the temperature were Log P (0.1 MPa)=-3525/T+6.667 for hydriding and Log P (0.1 MPa)=-3724/T+6.883 for dehydriding. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：118 / 123

页数：6

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