Why can hydrogen storage alloys store hydrogen

What is a hydrogen storage alloy?

Among them, alloys have become leading hydrogen-storage materials owing to their favorable cost, safety, operating conditions, particularly their high energy density by volume. For example, the most commonly used commercial hydrogen-storage alloy in nickel–metal hydride batteries is the AB 5 alloy with a CaCu 5 crystal structure.

What materials are used for hydrogen storage?

Storage of the hydrogen needs metallic materials that have the ability to absorb and desorb the hydrogen. In this chapter, we will discuss the characteristics of different types of alloys that are used in the hydrogen storage; also, we will show the suitable industrial applications for each alloy type.

How is hydrogen stored?

In physical storage, hydrogen is stored through compression and liquefaction. In chemical storage, hydrogen is stored through storing hydrides [ 4 ]. Metal hydrides are metals which have the ability to make a bond with hydrogen to produce new compound [ 5 ].

Which alloy is best for hydrogen storage?

For example, the most commonly used commercial hydrogen-storage alloy in nickel–metal hydride batteries is the AB 5 alloy with a CaCu 5 crystal structure. However, conventional alloys also face many problems in hydrogen storage.

Can hydrogen be stored in metals?

Storing hydrogen in metals has received much attention due to the advantages of this approach for safely storing. It is a promising method of storing hydrogen and eliminates the challenges associated with storing hydrogen gas at high pressure, which includes material durability, tank safety, and overall weight.

What is a hydrogen absorbing alloy?

Table 14.2. Main hydrogen-absorbing alloys and their hydride properties. Vanadium is the only metal that can absorb and release hydrogen at room temperature. Many countries have developed various V-based solid-solution BBC hydrogen storage alloys.