Solid Hydrogen Storage Materials: Non-interstitial Hydrides

Electrolyte-Assisted Hydrogen Storage Reactions

“…Here we explore the idea that the kinetics of hydrogen cycling in multiple-phase hydrogen storage materials may be improved through the addition of a liquid electrolyte. The electrolyte may assist interparticle transport and promote the overall reaction (addressing the restrictions listed above) by (1) solubilizing reacting ions, (2) providing liquid-state diffusion rates facilitating long distance transport, and (3) giving transported ions access to the full surface area of the reacting phases by surface wetting, effectively greatly increasing the number of favorable interactions of the reacting species. We show that using electrolytes can significantly increase the rates of dehydrogenation and hydrogenation, by factors of ∼10× or more.…”

“…Hydrogen cycling in high capacity hydrogen storage materials often involves multiple solid phases in powder-particle form that must interact, nucleate, grow, and shrink during reaction. These materials, including many complex hydrides − and destabilized hydride mixtures (also called reactive hydride composites), have rates of hydrogen uptake and release that are typically very slow. To address this issue, catalytic additives and nanoscale formulations − have been studied extensively.…”

“…Introduction Hydrogen cycling in high capacity hydrogen storage materials often involves multiple solid phases in powder-particle form that must interact, nucleate, grow, and shrink during reaction. These materials, including many complex hydrides [1][2][3] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 4 mixtures 4 (also called reactive hydride composites 5 ), have rates of hydrogen uptake and release that are typically very slow. To address this issue, catalytic additives 6 and nanoscale formulations 7-9 have been studied extensively.…”