MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Effects of Y Substitution for La on the Microstructure and Electrochemical Properties of LaNi3.55Mn0.4Al0.3Co0.75 Hydrogen Storage Alloys
W. LiY. L. Du
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2008 Volume 49 Issue 10 Pages 2229-2232

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Abstract

The effects of the partial substitution of Y for La in La1−xYxNi3.55Mn0.4Al0.3Co0.75 (x=0, 0.1 and 0.2) alloys were reported in this paper. The single-phase CaCu5-type structure is retained after La is partially substituted by Y. However, the increase of Y content leads to decrease of the lattice parameters and unit-cell volume. Y substitution for La in the alloys is effective to improve the electrochemical properties at room temperature and high temperature. A critical substitution content of Y is found at x=0.1.

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© 2008 The Japan Institute of Metals and Materials
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