A new mutually destabilized reactive hydride system: LiBH4–Mg2NiH4

In this work, the hydrogen sorption properties of the LiBH4–Mg2NiH4 composite system with the molar ratio 2:2.5 were thoroughly investigated as a function of the applied temperature and hydrogen pressure. To the best of our knowledge, it has been possible to prove experimentally the mutual destabili...

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Bibliographic Details
Published in:Journal of energy chemistry 2019-07, Vol.34, p.240-254
Main Authors: Bergemann, Nils, Pistidda, Claudio, Uptmoor, Maike, Milanese, Chiara, Santoru, Antonio, Emmler, Thomas, Puszkiel, Julián, Dornheim, Martin, Klassen, Thomas
Format: Article
Language:English
Subjects:
Borohydrides
Hydrogen storage
Metal hydrides
Mutual destabilization
Reactive Hydride Composites (RHC)
Ternary borides
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Summary:In this work, the hydrogen sorption properties of the LiBH4–Mg2NiH4 composite system with the molar ratio 2:2.5 were thoroughly investigated as a function of the applied temperature and hydrogen pressure. To the best of our knowledge, it has been possible to prove experimentally the mutual destabilization between LiBH4 and Mg2NiH4. A detailed account of the kinetic and thermodynamic features of the dehydrogenation process is reported here. The hydride composite LiBH4–Mg2NiH4 reversibly releases hydrogen when MgNi2.5B2 is formed. The sorption process occurs without unfavorable side reactions because typical boron sinks, such as Li2B12H12 and elemental boron, also contribute to the MgNi2.5B2 formation. [Display omitted]
ISSN:2095-4956
DOI:10.1016/j.jechem.2019.03.011