Ball milling and AlB2 addition effects on the hydrogen sorption properties of the CaH2 + MgB2 system

Among the borohydrides proposed for solid state hydrogen storage,Ca(BH4)2 is particularly interesting because of its favourable thermodynamics and relatively cheap price.Composite systems,whereother species are present in addition to the borohydride,show some advantages in hydrogen sorption properties with respect to the borohydrides alone,despite a reduction of the theoretical storage capacity. We have investigated the milling time influence on the sorption properties of the CaH2 +MgB2 system from which Ca(BH4)2 and MgH2 can be synthesized by hydrogen absorption process.Manometric and calorimetric measurements showed better kinetics forlong time milled samples.We found that the total subst…

Dehydrogenation behaviour of mixed borohydrides dispersed on high specific surface area carbons

Hydrogen sorption in the CaH2+MgB2 system

Hydrogen sorption properties of the composite system calcium hydride – magnesium boride