LiBH4LiBH4 nanoparticles supported by disordered mesoporous carbon: Hydrogen storage performances and destabilization mechanisms

LiBH4LiBH4 nanoparticles supported by disordered mesoporous carbon CMK-3, denoted as nano-LiBH4/CmesoporousLiBH4/Cmesoporous, were synthesized in the present work. Nano-LiBH4LiBH4 in this sample was destabilized significantly, resulting in more favorable latent heat of dehydrogenation (40kJ/molH2)H2), large amount of dehydrogenation capacity (14 wt%) below 600∘C and reversible capacity of 6.0 wt% H2H2 at 350∘C. It was revealed that such destabilization results from two kinds of mechanisms: nano-dispersion and reaction with mesoporous carbon. Both mechanisms exert synergistic effects on the dehydrogenation of nano-LiBH4LiBH4 and reverse hydrogenation.