Adjusting the stability of complex metal hydrides
AssigneeInstitutt for Energiteknikk
InventorHendrik W. Brinks
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Abstract
The invention relates to a material for reversible hydrogen storage comprising a complex hydride based on one or more anions selected among BH4−, MgH3−, MH4− and MH63− (M=Al, Ga, In), and one or more cations, where the material has obtained amended stability due to substitution of the complex hydride phase itself. The invention also relates to a process for preparation of the material and use thereof, and a process for reversible hydrogen storage.
Claims14
A material for reversible hydrogen storage, which comprises a solid complex metal hydride based on one or more anions selected from the group consisting of BH4−, MH4−and MH63− where M is one member selected from the group consisting of Al, Ga and In, and one or more cations selected from the group consisting of alkali metals, alkaline earth metals, transition metals, lanthanoids, and Ga, where the material is substituted in part of the total number of anion-hydrogens with a halogen in the complex metal hydride and therefore has reduced stability.
A process for the preparation of a material for reversible hydrogen storage, which comprises a complex metal hydride based on one or more anions selected from the group consisting of BH4−, MH4−, and MH63−, where M is one member selected from the group consisting of Al, Ga, and In, and one or more cations selected from the group of alkali metals, alkaline earth metals, transition metals, lanthanoids, Al and Ga, where the material has reduced stability as a result of a substitution, comprising the steps of mixing a metal halogenide with a dehydrogenated product and rehydrogenating and substituting in part of the total number of anion-hydrogens with a halogen in the complex metal hydride during said steps of mixing and rehydrogenating.
Dependencies are inferred from the claim text.