High density hydrogen storage material
View Patent ↗A hydrogen storage material. The hydrogen storage material is a combination of LiBH 4 with MH x , wherein greater than about 50% of M comprises Al.
1. A method of reversibly producing a source of hydrogen gas comprising:
providing a hydrogen storage material comprising LiBH 4 combined with MH x , wherein greater than about 50% of M comprises Al and when M is Al then x=3, or 0;
heating the hydrogen storage material at a temperature less than 100° C. to release hydrogen and forming a spent hydrogen storage material; and
regenerating the hydrogen storage material by exposing the spent hydrogen storage material to hydrogen gas under elevated pressure and temperature.
2. The method of claim 1 wherein the hydrogen storage material has an enthalpy of reaction of less than about 80 kJ/mol H 2 .
3. The method of claim 1 wherein the hydrogen storage material reversibly stores at least 8 wt % H 2 .
4. The method of claim 1 wherein the hydrogen storage material has a single-crystal volumetric density about 50% higher than liquid H 2 .
5. The method of claim 1 wherein less than 50% of M is Ti, V, Cr, Sc, Fe, or combinations thereof.