Novel dehydrogenation properties derived from nanoscale LiBH4

作者：Wan Xuefei; Shaw Leon L^*

来源：Acta Materialia, 2011, 59(11): 4606-4615.

DOI：10.1016/j.actamat.2011.04.006

• Hydrides
• Hydrogen storage
• Nanostructure

Nanoscale, amorphous LiBH4 powder with sizes from 20 to 50 nm is synthesized via a solvent evaporation process without the aid of nanoscaffolds. The nanoscale LiBH4 starts to release H-2 at similar to 32 degrees C and forms Li2B12H12 at 265 degrees C or lower. The amount of H-2 released in the solid state from 25 to 265 degrees C reaches 3.5 wt.%, which is substantially higher than 0.75 wt.% H-2 released by bulk LiBH4. These novel dehydrogenation properties have been discussed based on the observed improvements in both the thermodynamic driving force and reaction kinetics. The nanoscale LiBH4 not only enhances the dehydrogenation kinetics, but also alters the rate-limiting step.

• 出版日期2011-6