A Process for Synthesizing the Li-Mg-N-H Hydrogen Storage System from Mg and LiNH2

Observation of Hydrogen Absorption/Desorption Reaction Processes in Li-Mg-N-H System by in-situ X-ray Diffractmetry

The in-situ XRD measurements on dehydrogenation/rehydrogenation of the Li-Mg-N-H system were performed in this work. The ballmilled mixture of 8LiH and 3Mg(NH2)2 as a hydrogenated phase gradually changed into Li2NH as a dehydrogenated phase during heat-treatment at 200 °C in vacuum for 50 h. Neither Mg-related phases nor other intermediate phases were recognized in the dehydrogenated phase. Wit...

New amide-chloride phases in the Li-Al-N-H-Cl system: formation and hydrogen storage behaviour.

New amide-chloride phases were successfully synthesized by mechanical milling of the LiNH2-AlCl3 mixture at a molar ratio of 1 : 0.11 and further heating at 150 °C under argon (0.1 MPa) or under hydrogen pressure (0.7 MPa). Powder X-ray diffraction measurements as a function of milling time increase revealed that the milling of the LiNH2-0.11AlCl3 mixture results in the formation of a FCC solid...

MECHANO-CHEMICAL SYNTHESIS OF NANOSTRUCTURED HYDRIDE COMPOSITES BASED ON Li-Al-N-Mg FOR SOLID STATE HYDROGEN STORAGE

It is observed that large quantities of hydrogen (H2) are released at ambient temperatures during the mechano-chemical synthesis of the Li-Al-N-Mg-based hydride composites using an energetic ball milling in a unique magneto-mill. For the (nLiAlH4+LiNH2; n=1, 3, 11.5, 30) composite, at the molar ratio n=1, the LiNH2 constituent destabilizes LiAlH4 and enhances its decomposition to Li3AlH6, Al an...

A combined hydrogen storage system of Mg(BH4)(2)-LiNH2 with favorable dehydrogenation

Intrinsic defects and dopants in LiNH2: a first-principles study.

The lithium amide (LiNH(2)) + lithium hydride (LiH) system is one of the most attractive light-weight materials options for hydrogen storage. Its dehydrogenation involves mass transport in the bulk (amide) crystal through lattice defects. We present a first-principles study of native point defects and dopants in LiNH(2) using density functional theory. We find that both Li-related defects (the ...