Every energy-related application of hydrogen (H2) requires safe and efficient storage. H2 can be stored as a compressed gas, a cryogenic liquid, or in an H-rich solid. The first two approaches require substantial energy for compression or liquefaction, and, therefore, entail multiple containment, safety, and economical issues. Conversely, H-rich solids are believed to be the best medium to store high-purity H2 required for fuel cells. Solid hydrides ensure high volumetric density of the fuel because in many of them the volumetric density of H2 at ambient conditions is nearly twice that of a cryogenic liquid at 20 K, reaching 120 g H2/l. The specific objectives of this FWP are to address issues that will advance basic science of complex hydrides and open up possibilities for their future use by drawing on the experience and expertise of principal investigators in materials science, physics and chemistry of complex hydrides, X-ray diffraction (XRD), high-resolution solid-state nuclear magnetic resonance (NMR), electron microscopy, and first-principles theory and modeling.
This research is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering.