Electrochemical performance of TiVNi-Quasicrystal and AB3-Type hydrogen storage alloy composite materials

The Ti1.4V0.6Ni ribbon alloy and AB(3)-type (La0.65Nd0.12Mg0.23Ni2.9Al0.1) alloy ingot are prepared by melt-spinning technique and induction levitation melting technique, respectively. The Ti1.4V0.6Ni + 20 wt.% AB(3) mixture powders are synthesized by ball-milling the above prepared alloy ingots, and their structures and the electrochemical hydrogen storage properties are investigated. It is found that the icosahedral quasicrystal, Ti2Ni, BCC structural solid solution and AB3-type phases are all presented in the composite material. The maximum electrochemical discharge capacity of the composite electrode is 294.7 mAh/g at the discharge current density of 30 mA/g and 303 K. In addition, the electrode made of Ti1.4V0.6Ni and AB(3) composite holds better high-rate discharge ability than that of Ti1.4V0.6Ni. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.