Layer-by-layer uniformly confined Graphene-NaAlH4 composites and hydrogen storage performance
Abstract
NaAlH4 is one of the most promising hydrogen storage materials due to its high energy density. However, the sluggish kinetic hindered it stepping into practical application. In this work, a bottom-up strategy was employed to confine NaAlH4 between graphene nanosheets with a millefeuille-liked multi-layer morphology. The NaAlH4 particles were uniformly arranged between graphene layers, with a high loading up to 90%, and performed improved dehydrogenation kinetic. The dehydrogenation peak temperature 55.7 °C decreased comparing with commercial NaAlH4. The generality of this nano-structuring strategy were confirmed by the successful synthesis of TiO2–NaAlH4 co-confined composites as well as the further enhanced kinetic.
- Publication:
-
International Journal of Hydrogen Energy
- Pub Date:
- October 2020
- DOI:
- 10.1016/j.ijhydene.2020.03.241
- Bibcode:
- 2020IJHE...4528116H
- Keywords:
-
- Hydrogen storage;
- Nano-confinement;
- NaAlH<SUB loc="post">4</SUB>;
- Graphene