A new Mg0.9Y0.1Ni hydride forming composition obtained by mechanical grinding

被引：19

作者：

Lenain, C ^{[1
]}

Aymard, L ^{[1
]}

Dupont, L ^{[1
]}

Tarascon, JM ^{[1
]}

机构：

[1] Univ Picardie, Lab React & Chim Solides, UPRESA 6007, F-80039 Amiens, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 292卷 / 1-2期

关键词：

MgNi alloy; yttrium; mechanical alloying; corrosion;

D O I：

10.1016/S0925-8388(99)00480-6

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：

We report on the synthesis of an electrochemically active Mg0.9Y0.1Ni polynanocrystalline phase by mechanical alloying. This alloy presents an initial capacity of 323 mAh/g that decreases upon cycling to reach a stable value of 220 mAh/g after 30 complete charge/discharge cycles (e.g. 62% capacity retention). Such an increase in capacity retention with respect to pure MgNi alloy (62% instead of 24%) is due to the addition of yttrium that enhances the resistance of the alloy against corrosion in concentrated alkaline media. (C) 1999 Published by Elsevier Science S.A. All rights reserved.

引用

页码：84 / 89

页数：6

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