Abstract
Several of the ZrMn/sub 2/-based systems ZrMn/sub 2/Mn/sub y/Fe/sub x/ have been investigated as materials for hydrogen storage. They appear to be excellent candidates. They have favorable capacity (higher volumetric capacity than liquid hydrogen), kinetics, and pressure-composition characteristics. Also, hydride decomposition is only slightly endothermal (..delta..H ranges from approx. 15 to 22 kJ/(mol of H/sub 2/)) so that little of the energy associated with hydrogen is lost during hydride formation. This and the small heat flow problem occasioned by the small ..delta..H together with the other favorabele features make these systems of interest as practical materials for hydrogen storage.
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