Hydrogen Storage

Hydrogen can be physically stored as either a gas or a liquid. Storage as a gas typically requires high-pressure (350-700 bar) tanks. Storage of hydrogen as a liquid requires cryogenic temperatures because the boiling point of hydrogen at one atmosphere pressure is -252.8°C.

Hydrogen can also be stored on the surfaces of solids (by adsorption) or within solids (by absorption)in the metal hydride lattice structure.