Nanoconfined 2LiBH4aMgH2aTiCl3 in carbon aerogel scaffold for reversible hydrogen storage

Nanoconfinement of 2LiBH4aMgH2aTiCl3 in resorcinolaformaldehyde carbon aerogel scaffold (RFaCAS) for reversible hydrogen storage applications is proposed. RFaCAS is encapsulated with approximately 1.6ANBwt. % TiCl3 by solution impregnation technique, and it is further nanoconfined with bulk 2LiBH4aMgH2 via melt infiltration. Faster dehydrogenation kinetics is obtained after TiCl3 impregnation, for example, nanoconfined 2LiBH4aMgH2aTiCl3 requires similar to 1 and 4.5ANBh, respectively, to release 95% of the total hydrogen content during the 1st and 2nd cycles, while nanoconfined 2LiBH4aMgH2 ( similar to 2.5 and 7ANBh, respectively) and bulk material ( similar to 23 and 22ANBh, respectively) take considerably longer. Moreover, 95a98.6% of the theoretical H2 storage capacity (3.6a3.75ANBwt. % H2) is reproduced after four hydrogen release and uptake cycles of the nanoconfined 2LiBH4aMgH2aTiCl3. The reversibility of this hydrogen storage material is confirmed by the formation of LiBH4 and MgH2 after rehydrogenation using FTIR and SR-PXD techniques, respectively.