Optimization of magnesium-based solid-state hydrogen storage for vehicles

Magnesium powders with small additives of other metals are studied to determine the optimal conditions for hydrogenation and dehydrogenation for using them as a solid-state hydrogen storage for vehicles. An optimal composition with the weight formula Mg$_{10}$Ni has been found. Only this composition is not subject to degradation of the reversible hydrogen capacity during cycling. It has been found that the maximum reversible capacity is achieved at the minimum hydrogenation temperature. An idea for choosing the optimal magnesium additive is proposed that is based on the atomic and electronic level.