Nanoengineering-Enabled Solid-State Hydrogen Uptake and Release in the LiBH₄ Plus MgH₂ System

Abstract

LiBH 4 , as a potential material with the highest reversible hydrogen storage capacity for hydrogen vehicle applications, has always been hydrogenated and dehydrogenated in the liquid state. In this study, we demonstrate, for the first time, that 8.3 wt % hydrogen uptake can be obtained from the LiBH 4 + MgH 2 system in the solid state through nanoengineering and mechanical activation. Hydrogen release, although slower than uptake, can also be attained in the solid state. All of these enhancements are achieved without any catalysts, which underscores the effectiveness of nanoengineering and mechanical activation as well as the opportunity for further improvements in the future.

Effect of lattice strain on the kinetics of hydride formation in metal nanoparticles

“…The contribution of lattice strain to this difference is given by Eq. (12). The important point is that expression (12) is independent of r, R and R p .…”

“…The understanding of the manifestation of lattice strain in the kinetics of hydriding or dehydriding of metal in general and metal nanoparticles in particular is now limited. In particular, the corresponding mean-field kinetic models [6][7][8][9][10][11][12] and Monte Carlo simulations [13,14], focused on micro-or nanoparticles, do not take lattice strain into account.…”

Pressure and temperature dependence of the decomposition pathway of LiBH4

“…6,7 Recently, extensive efforts have been mainly made to destabilize the compound and to improve its reversibility. [8][9][10][11][12][13][14][15][16][17][18] However, the decomposition and recombination mechanisms of LiBH 4 have not been fully understood.…”

Low Temperature Sintering of Gadolinium‐Doped Ceria for Solid Oxide Fuel Cells

“…These observations are consistent with our expectation because the two main functions of the low speed, dry ball milling are (i) reducing the sizes of micrometer or sub-micrometer agglomerates and (ii) inducing the sliding of nanoparticles to pass each other when nanoparticles are trapped during ball-to-ball or ball-to-wall collision. Note that even with high-energy ball milling (i.e., high speed, dry ball milling), the stress generated during ball-to-ball collision is not high enough to decrease particle sizes below 10 nm for many materials [29][30][31][32][33].…”