Effect of ball-milling on electrochemical and physicochemical characteristics of crystalline Mg2Ni alloy

被引：41

作者：

Inoue, H

Ueda, T

Nohara, S

Fujita, N

Iwakura, C

机构：

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

[2] Technol Res Inst Osaka Prefecture, Div Mat Engn, Osaka 5941157, Japan

来源：

ELECTROCHIMICA ACTA | 1998年 / 43卷 / 14-15期

关键词：

nickel-metal hydride battery; hydrogen storage alloy; Mg2Ni; surface modification; ball-milling; nanocrystallite; graphite;

D O I：

10.1016/S0013-4686(97)10110-4

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Two-step surface modifications for crystalline Mg2Ni alloy were tried to improve the charge-discharge characteristics at 30 degrees C. The surface modification of the alloy by ball-milling led to the improve ment of the discharge capacity, probably due to the increase in surface area and the decrease in diffusion length for the desorption of absorbed hydrogen as the result of the production of nanocrystallites. The subsequent surface modification with graphite led to a further increase in discharge capacity due to the improvement of electrocatalytic activity. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：2215 / 2219

页数：5

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[3]

Ivanov E., 1993, J MATER SYNTH PROC, V1, P405

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