How much hydrogen can 1 kg of rare earth hydrogen storage store

A volume of 11.2 Nm³ (the volume of the boot of a large utility or commercial vehicle) is needed to store just 1 kg of hydrogen, which is the amount required to travel approximately 100 km. Thus, for hydrogen storage to be economically viable, its storage density must be increased. Hydrogen storage using rare earth materials holds immense potential for energy applications, with 1. Storage capacity significantly varying based on material type, 2. High surface area contributing to efficient adsorption, and 3. Temperature and pressure conditions playing critical roles. Notably. They can store hydrogen in a solid - state, which offers advantages such as high volumetric hydrogen density and relatively safe storage conditions. Conventional metal hydrides like magnesium hydride (MgH₂) and titanium - based hydrides have been extensively studied. MgH₂ has a high theoretical. The most suitable storage vessel will be determined by the use of this storage, the volume to be stored, the length of storage, the required discharge rate, the geographical availability of different options and whether the storage is small-scale or large-scale. For large-scale storage, the energy. Rare earth-based materials (such as AB₅ type hydrogen storage alloys) and magnesium-based materials (such as MgH₂) complement each other in terms of power density, cost, and safety due to their material property differences. In April 2025, breakthroughs in the industrialisation of these two types.