|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials for Energy Conversion and Storage
||Hydrogen Storage Using Alane Stabilized via Surface Functionalization of Nanoporous Ordered Hard Carbons
||Waruni Jayawardana, Christopher Carr, Xander Benziger, Paul Jelliss, Hongyang Zou, Samuel Emery, Mark Conradi, Eric Majzoub
|On-Site Speaker (Planned)
Hydrogen storage for transportation applications using metal hydrides requires the use of alkali or alkaline earth elements or light metals such as aluminum. State-of-the-art research on these materials has produced few candidates, including NaAlH<SUB>4</SUB> and LiBH<SUB>4</SUB>. One ideal material is alane (AlH<SUB>3</SUB>) that has 10 wt.% hydrogen but is thermodynamically unstable with an enthalpy change on desorption of about 11 kJ/mol H<SUB>2</SUB>. It is known that alane may be stabilized in solution using amine bases such as dimethylethylamine (DMEA) or triethylenediamine. We have prepared nanostructured high-surface area carbons doped with nitrogen where 1/3 of the hetero-atom nitrogen in the carbon framework are pyridinic, possessing a lone pair of electrons as in the amine bases above. We show that these surface-functionalized carbon frameworks may solvate the alane when exchanged with DMEA in solution. We discuss the characterization and hydrogen storage characteristics of these materials.