Estudio y caracterización del efecto de compuestos con titanio sobre el sistema hidruro Li-B-Mg-H con alta capacidad de almacenamiento de hidrógeno

Hydrogen storage in solid state through hydride compounds formation is a potential alternative to address this problem. In this work, it is studied the effect of different titanium based compounds (TiB2, LixTiO2) on the kinetic behavior of 2LiBH4+MgH2 reactive hydride composite.

It is found that nanometric particles of titanates (LixTiO2) noticeably improve the first non-isothermal dehydrogenation behavior of the 2LiBH4+MgH2, reducing the complete H2 release time from 35 h to 2 h. Moreover, the LixTiO2 addition improves the isothermal hydrogenation/dehydrogenation kinetic behavior. The information gained by advanced techniques such as transmission electron microscopy and Raman spectroscopy, among others, help us to elucidate that the addition of LixTiO2 to 2LiBH4+MgH2 allows the hydrogen uptake/release via a novel and reversible mechanism.