It is shown that occurrence of magnesium hydride electrical conductivity occurs in the field of existence of high-pressure hP 2 phase This work was partially supported by the Presidium of the Russian Academy of Sciences within the Program of Basic Research ``Thermal Physics and Mechanics of Extreme Energy Effects and Physics of Strongly Compressed Matter and Russian Foundation for Basic Research Grant No. Identification of the hydride in experiments was made on the basis of calculations of phase trajectories loading a material in the area of existence of polymorphic phases including high-pressure phases of magnesium hydride (α and γ MgH 2, hP1 and hP 2). High pressures and temperatures were obtained with an explosive device, which accelerates the metallic impactor up to 3 km/s. A study of thermodynamic properties of MgH 2 under multishock compression has been carried out also. Earlier we had been experimentally studied metallization possibility of alane at high pressures in conditions quasiisentropic compression up to 100 GPa. The electrical conductivity of MgH 2 has been studied under multishock compression. Shakhray, Denis Molodets, Alexander Fortov, Vladimir SECURITY CLASSIFICATIONĮlectrical conductivity of MgH 2 at multiple shock compression SUBJECT TERMS magnesium hydride, MgH, thermal energy storage materials, endothermic reaction 16. Wronski: Particle size, grain size and gamma-MgH 2 effects on the desorption properties of nanocrystal- line commercial magnesium hydride processed.Catalytic effects of various forms of nickel on the synthesis rate and hydrogen desorption properties of nanocrystalline magnesium hydride ( MgH 2.dehydrogenation reaction. Catalytic Influence of Ni-based Additives on the Dehydrogentation Properties of Ball Milled MgH 2 (PREPRINT) Further experiments confirm that the low temperature kinetic degradation can be mainly related the extended hydrogenation-dehydrogenation reactions. However, the low temperature (25Â☌ to 150Â☌) hydrogenation kinetics suffer a severe degradation during hydrogen cycling. The hydrogenating and dehydrogenating kinetics at 300Â☌ are stable after 100 cycles. Three systems, including MgH 2-TiH 2, MgH 2-TiMn 2, and MgH 2-VTiCr, are examined. Cyclic stability of catalyzed MgH 2 is characterized and analyzed using a PCT Sievert-type apparatus. Thermodynamic properties of the reactions between the magnesium solid solution alloys and hydrogen are investigated, showing that all the solid solution alloys that are investigated in this work have higher equilibrium hydrogen pressures than that of pure magnesium. Various elements are alloyed with magnesium to form solid solutions, including indium and aluminum. Solid solution alloys of magnesium are exploited as a way to destabilize magnesium hydride thermodynamically. The results show that additives such as Ti and V-based metals, hydride, and certain intermetallic compounds have strong catalytic effects. A systematic experimental survey is carried out in this study to compare a wide range of additives including transitions metals, transition metal oxides, hydrides, intermetallic compounds, and carbon materials, with respect to their effects on dehydrogenation properties of MgH 2. TiV0.62Mn1.5, TiMn 2, and LaNi5 alloys are selected as the matching cold hydride. The hot hydride that is identified and developed is catalyzed MgH 2 due to its high energy density and enhanced kinetics. The system utilizes a pair of thermodynamically matched metal hydrides as energy storage media. A concept of thermal battery based on advanced metal hydrides is studied for heating and cooling of cabins in electric vehicles. Metal hydrides are a group of important materials known as energy carriers for renewable energy and thermal energy storage. A study of advanced magnesium-based hydride and development of a metal hydride thermal battery system
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