Enhanced electrochemical properties of ball-milled Mg2Ni electrodes

被引：120
作者：
Niu, H
Northwood, DO
机构：
[1] Ryerson Polytech Univ, Fac Engn & Appl Sci, Toronto, ON M5B 2K3, Canada
[2] Versatech Sealing Syst, Leamington, ON N8H 3W5, Canada
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2002年 / 27卷 / 01期
基金：
加拿大自然科学与工程研究理事会;
关键词：
D O I：
10.1016/S0360-3199(01)00077-5
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 characteristics and mechanisms of enhanced electrochemical properties for a Mg,Ni alloy produced by a ball-milling treatment were investigated by electrochemical measurements and XRD analysis. Them particle size decreases, the internal strain increases, and the alloy gradually becomes amorphous on ball-milling. With the accompanying increased diffusion rate of hydrogen into the ball-milled Mg2Ni alloy, the limiting current density, i(erit), is decreased and the exchange current density, i(0), is increased. As a result, the specific discharge capacity is significantly increased compared to that of the as-received Mg2Ni alloy and reaches a maximum for a ball-milling time of 25 h. (C) 2001 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved.
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页码：69 / 77
页数：9
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