Stability and Reversibility of LiBH4
Citations Over TimeTop 1% of 2007 papers
Abstract
LiBH4 is a complex hydride and exhibits a high gravimetric hydrogen density of 18.5 wt %. Therefore it is a promising hydrogen storage material for mobile applications. The stability of LiBH4 was investigated by pcT (pressure, concentration, and temperature) measurements under constant hydrogen flows and extrapolated to equilibrium. According to the van 't Hoff equation the following thermodynamic parameters are determined for the desorption: enthalpy of reaction DeltarH = 74 kJ mol-1 H2 and entropy of reaction DeltarS = 115 J K-1 mol-1 H2. LiBH4 decomposes to LiH + B + 3/2H2 and can theoretically release 13.9 wt % hydrogen for this reaction. It is shown that the reaction can be reversed at a temperature of 600 degrees C and at a pressure of 155 bar. The formation of LiBH4 was confirmed by XRD (X-ray diffraction). In the rehydrided material 8.3 wt % hydrogen was desorbed in a TPD (temperature-programmed desorption) measurement compared to 10.9 wt % desorbed in the first dehydrogenation.
Related Papers
- → A comparison of hydrogen storage in activated carbons and a metal–organic framework (MOF-5)(2010)73 cited
- → High Volumetric Hydrogen Storage Capacity using Interpenetrated Metal–Organic Frameworks(2017)45 cited
- → Compositional effects on the hydrogen storage properties of Mg(NH2)2–2LiH–xKH and the activity of KH during dehydrogenation reactions(2013)43 cited
- → Excellent catalytic effect of LaNi5 on hydrogen storage properties for aluminium hydride at mild temperature(2021)33 cited
- → Development of Mg Li B based advanced material for onboard hydrogen storage solution(2016)21 cited