Mg-based nanocomposites for room temperature hydrogen storage

Abstract

Nanostructured composite Mg 2Ni/LaNi 5 materials have been synthesised using the mechanical alloying process. Hydrogen storage capacities and discharge capacities of the produced materials have been measured. The results show that nanostructured 50%Mg 1.5Mn 0.5Ni/50% LaNi 3.75Mn 0.75Al 0.25Co 0.25 composite material releases 1.6 wt.% hydrogen at room temperature. The nanocrystalline metal hydrides offer a breakthrough in prospects for practical applications. Their excellent properties (significantly exceeding traditional hydrides) are a result of the combined engineering of many factors: alloy composition, surface properties, microstructure, grain size and others. Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.