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There are also other types of technologies that exploit the ability of hydrogen to bind to chemical compounds or metals to facilitate the accumulation and transport. this process can also take place at relatively low pressures allowing hydrogen to penetrate inside the crystal lattice of the metal, forming the so-called hydrides. later,to regain the desired hydrogen, simply increase the temperature so that it extends from the structure and become usable. this technology allows the attainment of even higher energy density than the compressed hydrogen or liquid. In fact, the storage volume could be reduced by up to 3-4 times the original one.However, the main problem lies in the weight of these compounds, in particular due to the presence of metals, which makes it difficult the use of mobile devices and vehicular.
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