Nanostructured metal amides and nitrides for hydrogen storage
| DWPI Title: Manufacture of nanocomposite used for energy storage material, involves combining nanoporous template with alkaline or alkaline-earth metal, reacting alkaline or alkaline-earth metal with ammonia to form nanostructures in pores of template |
| Abstract: Nanostructured metal amides and nitrides are incorporated into nanoporous templates, such as carbon, using liquid ammonia as a solvent/reagent. This leads to unexpected improvements in metal amide nanoconfined hydrogen storage materials. The resulting nanostructured materials may reversibly absorb and desorb large capacities of hydrogen under conditions that are much milder compared to what has been achieved with bulk materials. In addition, the nanoconfined materials may reduce the amounts of ammonia released upon dehydriding, which may make the released hydrogen gas purer and may limit the capacity loss. In addition, nanoconfinement may simplify the reaction mechanism, eliminating undesired metal imide intermediates and promote hydrogen cycling under mild conditions. The liquid ammonia method also allows the simultaneous introduction of catalytic additives along with the parent hydrogen storage material. |
| Use: Manufacture of nanocomposite e.g. reversible hydrogen-storage nanocomposite (claimed) used for energy storage materials e.g. hydrogen energy storage materials for hydrogen fuel cells used for electric vehicles and light-duty vehicles. |
| Advantage: The nanocomposite obtained from the method is capable of reversibly absorbing and desorbing large capacities of hydrogen, reducing amount of ammonia released upon dehydriding, eliminating undesired metal imide intermediates and promoting hydrogen cycling under mild conditions. |
| Novelty: Manufacture of nanocomposite involves combining a nanoporous template with an alkaline or alkaline-earth metal dissolved in liquid ammonia, reacting the alkaline or alkaline-earth metal with ammonia to form nanostructures comprising an alkaline metal nitride or alkaline-earth metal nitride (I) and/or a mixed metal amide-metal hydride (II). The nanostructures form in pores of the porous template. |
| Filed: 8/23/2016 |
| Application Number: US15244762A |
| Tech ID: SD 13301.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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