High capacity stabilized complex hydrides for hydrogen storage
AssigneesToyota Motor Engineering & Manufacturing North America, Inc., Savannah River Nuclear Solutions, LLC (Srns)
InventorsRagaiy Zidan, Rana F. Mohtadi, Christopher Fewox, Premkumar Sivasubramanian
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Abstract
Complex hydrides based on Al(BH4)3 are stabilized by the presence of one or more additional metal elements or organic adducts to provide high capacity hydrogen storage material.
Claims21
A hydrogen storage composition, comprising:
- a complex compound having the composition
- Mx+Al3+(BH4−)3+x,
- wherein
- M is a metal other than Al selected from the group consisting of alkali metals, alkaline earth metals, transition metals and lanthanide rare earth elements;
- x is a valence number of 1, 2, 3, 4, 5, 6, 7 or 8,
- the complex compound is a solid material, and
- the hydrogen storage composition is capable of releasing hydrogen at a temperature of less than 200° C.
A method to prepare a hydrogen storage composition, the method comprising:
- reacting Al(BH4)3 with a stabilization agent to obtain
- a complex compound having the composition
- Mx+Al3+(BH4−)3+x,
- wherein
- M is a metal other than Al selected from the group consisting of alkali metals, alkaline earth metals, transition metals and lanthanide rare earth elements;
- x is a valence number of 1, 2, 3, 4, 5, 6, 7 or 8,
- the complex compound is a solid material, and
- the hydrogen storage composition is capable of releasing hydrogen at a temperature of less than 200° C.
A hydrogen storage composition, comprising:
- a complex compound having the composition
- M1x+M2y+Al3+(BH4−)3+x+y,
- wherein
- M1 and M2 are different metals other than Al selected from the group consisting of alkali metals, alkaline earth metals, transition metals and lanthanide rare earth elements;
- x is a valence number of 1, 2, 3, 4, 5, 6, 7 or 8;
- y is a valence number of 1, 2, 3, 4, 5, 6, 7 or 8
- the complex compound is a solid material, and
- the hydrogen storage composition is capable of releasing hydrogen at a temperature of less than 200° C.
A method of making a hydrogen storage composition, the method comprising:
- reacting Al(BH4)3 with two stabilization agents to obtain a complex compound having the composition
- M1x+M2y+Al3+(BH4−)3+x+y,
- wherein
- M1 and M2 are different metals other than Al selected from the group consisting of alkali metals, alkaline earth metals, transition metals and lanthanide rare earth elements;
- x is a valence number of 1, 2, 3, 4, 5, 6, 7 or 8;
- y is a valence number of 1, 2, 3, 4, 5, 6, 7 or 8
- the complex compound is a solid material, and
- the hydrogen storage composition is capable of releasing hydrogen at a temperature of less than 200° C.
A hydrogen storage composition, comprising:
- a complex compound having a formula
- Al(BH4)3:R,
- wherein
- R is an organic adduct,
- the complex compound is a solid material, and
- the hydrogen storage composition is capable of releasing hydrogen at a temperature of less than 200° C.
A hydrogen storage composition, comprising a compound selected from the group of compounds consisting of:
- a compound of the formula K[Al(BH4)4] having the XRD spectrum shown in FIG. 5,
- a compound of the formula Li[Al(BH4)4] having the XRD spectrum shown in FIG. 6,
- a compound of the formula Al(BH4)3.xTEDA where x=1 or 2 having the X-ray diffraction spectrum shown in FIG. 7.
Dependencies are inferred from the claim text.