Although previous studies12,19À22 show that each Li can adsorb up to three or four H2 molecules, we find that in the present system, due to steric hindrance, it is impossible to store more than two H2 molecules on each Li site .
Although previous studies12,19À22 show that each Li can adsorb up to three or four H2 molecules, we find that in the present system, due to steric hindrance, it is impossible to store more than two H2 molecules on each Li site .