The electrochemical properties of LaxMg3-xNi9 (x=1.0-2.0) hydrogen storage alloys

被引：146

作者：

Liao, B

Lei, YQ ^{[1
]}

Lu, GL

Chen, LX

Pan, HG

Wang, QD

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Cent Lab, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2003年 / 356卷

关键词：

hydrogen storage alloy; crystal structure; X-ray diffraction; electrochemical properties; Ni/MH batteries;

D O I：

10.1016/S0925-8388(03)00083-5

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：

LaxMg3-xNi9 (x = 1.0-2.0) alloys were prepared by a powder sintering method and the influence of partial substitution of Mg by La on the crystal structure and electrochemical performance of the alloys was investigated. The ternary alloys with different La/Mg ratio are related to the hexagonal PuNi3-type structure. The increase of La/Mg ratio in the alloys leads to a linear increase of the unit cell volume. The La-rich alloys (x = 1.8-2.0) show promising electrode proper-ties including a large discharge capacity (similar to400 mAh/g), easy activation and good high-rate dischargeability, although the cycling stability needs further improvement. (C) 2003 Elsevier B.V. All rights reserved.

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页码：746 / 749

页数：4

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