The alloy has the property of inhaling and storing hydrogen, so hydrogen can be stored without fear of exploding.
Hydrogen is easy to penetrate the cracks in the metal, making it smooth. It is a hydrogen storage alloy that utilizes this property by looking at the positive side (which permeates through cracks in metal) rather than the negative side (which makes the metal soft). When cooled or pressurized, hydrogen is absorbed to become a metallic hydrogen compound, and heat is generated at the same time. Conversely, heating or decompression can cause the heat to be taken away by releasing hydrogen again.
If hydrogen is stored using a hydrogen storage alloy, not only does it reduce its volume from one-third to one-fifth of that of gas, but it is also safe because it does not have a risk of explosion. Once the metal absorbs hydrogen, the purity of hydrogen can be obtained.