A mixture of containing two chemical equivalents of lithium borohyride and one equivalent of magnesium fluoride is known to yield hydrogen in an amount of about 7.6 wt% of the mixture when heated to about 150 degrees C at atmospheric pressure by the following reaction; 2LiBH(4) + MgF2 = 2LiF + MgB2 + 4H(2). In order to increase hydrogen storage capacity of Mg-based materials, a mixture with a composition of 2LiBH(4) + MgF2 and LiBH4 with a higher hydrogen storage capacity of 18.4 wt% were added to MgH2. MgH2 composite with a composition of 40 wt%MgH2 + 30 wt%LiBH4 + 30 wt%(2LiBH(4) + MgF2) was prepared by reactive mechanical grinding. The hydrogen storage properties of the sample were then examined. Hydrogen content vs. desorption time curves for consecutive 1st desorptions of 40 wt%MgH2 + 30 wt%LiBH4 + 30 wt%(2LiBH(4) + MgF2) at 533-873 K showed that the total desorbed hydrogen quantity for consecutive 1st desorptions is 7.07 wt%. (C) 2012 Elsevier Ltd. All rights reserved.