Preparation and characterization of Mg0.9Ti0.06V0.04Ni-carbon material composites for electrochemical use

被引：15

作者：

Iwakura, C ^{[1
]}

Nohara, S ^{[1
]}

Inoue, H ^{[1
]}

机构：

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

来源：

SOLID STATE IONICS | 2002年 / 148卷 / 3-4期

关键词：

MgNi alloy; amorphous; nickel-metal hydride battery; surface modification; graphite;

D O I：

10.1016/S0167-2738(02)00094-2

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：

Effects of both bulk and surface modifications of amorphous MgNi alloy on its physicochemical and electrochemical characteristics were investigated. It was found from results of thermogravimetry (TG) that the partial substitution of Mg in MgNi with both Ti and V and the subsequent surface modification with graphite greatly enhanced the hydrogen desorbability of the MgNi alloy compared with either the partial substitution or the surface modification. In charge-discharge cycle tests, Mg0.9Ti0.06V0.04Ni-graphite composite exhibited better high-rate dischangeability and cycle performance than either Mg0.9Ti0.06V0.04Ni alloy or MgNi-graphite composite. These results indicate that both bulk and surface modifications of the MgNi alloy are very effective in improving their hydrogen desorbability and charge-discharge characteristics. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：499 / 502

页数：4

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