The Effects of Mechanical Milling and Nb-Based Additives on the Kinetics Sorption Properties of 2LiBH4-MgH2

Farhanah Marwan, Raphaël Janot, Jean-Noël Chotard


In this work, the effects of ball milling with different catalysts (including NbF5 and Nb2O5) on the hydrogen storage properties of 2LiBH4-MgH2 system were investigated. The increase of ball-milling time (from 5 min to 24 h) can reduce the crystallites size of MgH2 from 74 nm to 14 nm and decrease the dehydrogenation temperature of MgH2 from 390°C to 345°C. Among Nb-based catalysts, sample with NbF5 shows slightly better sorption kinetics than the one with Nb2O5, it can store reversibly about 9 wt.% of H2 in 24 h at 350°C, whereas more than 60 h are needed with Nb2O5 . This indicates that NbF5 is superior to Nb2O5 for improving the sorption kinetics of 2LiBH4-MgH2 system.


Ball milling; Catalysts; Hydrogen storage; Magnesium hydride

Full Text:



House, Stephen D, et al., “Effect of ball-milling duration and dehydrogenation on the morphology, microstructure and catalyst dispersion in Ni-catalyzed MgH2 hydrogen storage materials”. Acta Materialia, vol. 86, pp 55-68, 2015.

Vajo, John.J, et al., ”Reversible storage of hydrogen in destabilized LiBH4”. The Journal of Physical Chemistry Letters vol. 109, pp 3719-3722, 2005.

Yuan, Huajun, et al., “Hydriding behavior of magnesium-based hydrogen storage alloy modified by mechanical ball-milling. Materials Chemistry and Physics vol. 83, pp 340-344, 2004.



  • There are currently no refbacks.

View my Stat: Click Here

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.