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
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
收藏
页码:142 / 144
页数:3
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