A high pressure observation of the Mg2NiH4-H system

被引：20

作者：

Chen, J

Sakai, T

Kitamura, N

Tanaka, H

Takeshita, HT

Kuriyama, N

Harimoto, D

Nagai, H

Fukai, Y

机构：

[1] Osaka Natl Res Inst, Osaka 5638577, Japan

[2] Osaka Univ, Sch Engn, Suita, Osaka 5650871, Japan

[3] Chuo Univ, Dept Phys, Bunkyo Ku, Tokyo 112, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 307卷

关键词：

hydrogen storage materials; energy storage materials; X-ray diffraction; high pressure;

D O I：

10.1016/S0925-8388(00)00793-3

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 high pressure (6 Gpa) and high temperature (600 degrees C) on the Mg2NiH4-H system has been investigated by using thermogravimetry, differential thermal analyses, and X-ray diffraction. The high-pressure treated Mg2NiHx (HP-Mg2NiHx) can desorb 5.2 wt% of hydrogen from room temperature to 400 degrees C. This value is about 1.6 wt% higher than that of standard Mg2NiH4. The hydrogen stored in HP-Mg2NiHx is released at quite a low temperature owing to the unstability of the sample that may have a changed distribution of hydrogen site energy. Results indicate that metal-hydride complex Mg2NiH6 with a cubic structure is likely to exist. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：L1 / L5

页数：5

共 21 条

[1] Molecular cluster approach to electronic state and chemical bonding in metallic materials [J].