Hydriding and electrochemical characteristics of a homogeneous amorphous Mg2Ni-Ni composite

被引：93

作者：

Iwakura, C ^{[1
]}

Inoue, H ^{[1
]}

Zhang, SG ^{[1
]}

Nohara, S ^{[1
]}

机构：

[1] Univ Osaka Prefecture, Coll Engn, Dept Appl Chem, Sakai, Osaka 5998531, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1998年 / 270卷 / 1-2期

关键词：

nickel-hydrogen battery; hydrogen storage alloy; Mg2Ni; amorphous; ball-milling;

D O I：

10.1016/S0925-8388(98)00517-9

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：

Hydriding and electrochemical characteristics of a homogeneous amorphous Mg2Ni-Ni composite prepared by ball-milling of Mg2Ni alloy with Ni (70 wt.% vs. Mg2Ni) were investigated. It was found that the Mg2Ni-Ni composite absorbed hydrogen to the amount of 4.0 wt.% vs. Mg2Ni [2.4 wt.% vs. (Mg2Ni+70 wt.% Ni)] at a high rate under a hydrogen pressure of 3 MPa at 30 degrees C. Furthermore, this alloy exhibited an extremely high discharge capacity of similar to 1082 mAh g(Mg2Ni)(-1) [636 mAh g(Mg2Ni +70 wt.% Ni)(-1)] at 30 degrees C, which exceeded the theoretically calculated value of 999 mAh g(Mg2Ni)(-1) on the basis of Mg2NiH4 for crystalline Mg2Ni. (C) 1998 Elsevier Science S.A.

引用

页码：142 / 144

页数：3

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