▎ 摘　　要

In the present work, two LiBH4 based hydrogen storage composites, namely, 3LiBH(4)/graphene and 3LiBH(4)/graphene-10 wt% CeF3, were prepared through ball milling and their hydrogen sorption behaviors were investigated. It was shown that the dehydrogenation kinetics of 3LiBH(4)/graphene was improved by doping 10 wt% CeF3, which was attributed to the formation of CeB6. The rehydrogenation of the 3LiBH(4)/graphene composite could be achieved under 440 degrees C with 3.3 MPa hydrogen pressure and the hydrogen absorption capacity reached 7.40 wt% to LiBH4 after 10 h. Further addition of CeF3 did not improve the rehydrogenation kinetics but reduced the absorption capacity. SEM observations suggested that LiBH4 was confined in a graphene wrapper after rehydrogenation, forming "graphene capsules" that helped the regeneration of LiBH4.