Abstract
The LiBH4+MgH2 system has great potential for hydrogen vehicle applications. In this study, the reported solid-state hydrogenation system made of LiH+1/2MgB2 has been investigated using ultrahigh field nuclear magnetic resonance spectroscopy. It is found that Mg–Li ion exchange occurs within MgB2 during ball milling to form a compound of (Mg1−xLi2x)B2, which facilitates the formation of LiBH4 in the subsequent hydriding reaction. This discovery offers a scientific foundation for investigating the detailed mechanisms of solid-state hydrogenation and dehydrogenation of the LiBH4+MgH2 system in the future.
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