Electrochemical properties of mechanically ground Mg2Ni alloy

被引：51

作者：

Kohno, T ^{[1
]}

Yamamoto, M ^{[1
]}

Kanda, M ^{[1
]}

机构：

[1] Toshiba Corp, Mat & Devices Res Labs, Saiwai Ku, Kawasaki, Kanagawa 2108572, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 293卷

关键词：

hydrogen storage alloy; Mg2Ni; mechanical grinding; electronegative element; Pd;

D O I：

10.1016/S0925-8388(99)00358-8

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 electrochemical properties of Mg2Ni type alloy powder prepared with a mechanical grinding (MG) of Mg2Ni and Ni or Pd powders were investigated. This alloy powder was found to be mainly changed to an amorphous-like matrix with dispersed nano-size Ni or Pd particles by the MG treatment. As a result, the negative electrode of the mechanically ground Mg2Ni alloy with Ni showed a large discharge capacity (830 mAh/g) which is 2.5 times larger than that of AB, type alloys. In the mechanically ground Mg2Ni alloy with Pd, the cycle life of the alloy electrode was considerably improved. The effect of partial substitution on the hydrogen storage properties of Mg2Ni was also investigated. It was found that the hydrogen reversibility of the mechanically ground Mg1.9M0.1Ni (M=Al, B, C, Ag) alloy electrode was remarkably improved by the substitution of Mg with more electronegative elements. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：643 / 647

页数：5

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