Researchers significantly improve H2 storage properties of sodium aluminium hydride by doping with 2D titanium carbide
A team at Zhejiang University in China has significantly enhanced the hydrogen storage properties of sodium aluminum hydride (NaAlH4) by doping it with a 2D titanium carbide (Ti3C2) MXene. (“MXenes” are exfoliated 2D carbide and carbonitride nanosheets that are structurally similar to graphene, where M represents transition metals, and X is either C or/and N, earlier post).
In a paper in the journal Journal of Power Sources, they report that in the presence of Ti3C2, the operating temperatures for hydrogen storage in NaAlH4 are remarkably reduced, and the hydrogenation/dehydrogenation kinetics are significantly enhanced. The onset dehydrogenation temperature of the 7 wt% Ti3C2-containing NaAlH4 sample is reduced to 100 °C, and hydrogen recharging starts at 50 °C.
Ruyan Wu, Hufei Du, Zeyi Wang, Mingxia Gao, Hongge Pan, Yongfeng Liu (2016) “Remarkably improved hydrogen storage properties of NaAlH4 doped with 2D titanium carbide,” Journal of Power Sources, Volume 327, Pages 519-525 doi: 10.1016/j.jpowsour.2016.07.095