Designing an AB 2 -Type Alloy (TiZr-CrMnMo) for the Hybrid Hydrogen Storage Concept

Julián Puszkiel, José M. Bellosta von Colbe, Julian Jepsen, Sergey V. Mitrokhin, Elshad Movlaev, Victor Verbetsky and Thomas Klassen
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Julián Puszkiel: Department of System Development, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany
José M. Bellosta von Colbe: Department of System Development, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany
Julian Jepsen: Department of System Development, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany
Sergey V. Mitrokhin: Chemistry Department, Lomonosov Moscow State University, 119992 Moscow, Russia
Elshad Movlaev: Chemistry Department, Lomonosov Moscow State University, 119992 Moscow, Russia
Victor Verbetsky: Chemistry Department, Lomonosov Moscow State University, 119992 Moscow, Russia
Thomas Klassen: Department of System Development, Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany

Energies, 2020, vol. 13, issue 11, 1-26

Abstract: The hybrid hydrogen storage method consists of the combination of both solid-state metal hydrides and gas hydrogen storage. This method is regarded as a promising trade-off solution between the already developed high-pressure storage reservoir, utilized in the automobile industry, and solid-state storage through the formation of metal hydrides. Therefore, it is possible to lower the hydrogen pressure and to increase the hydrogen volumetric density. In this work, we design a non-stoichiometric AB 2 C14-Laves alloy composed of (Ti 0.9 Zr 0.1 ) 1.25 Cr 0.85 Mn 1.1 Mo 0.05 . This alloy is synthesized by arc-melting, and the thermodynamic and kinetic behaviors are evaluated in a high-pressure Sieverts apparatus. Proper thermodynamic parameters are obtained in the range of temperature and pressure from 3 to 85 °C and from 15 to 500 bar: ΔH abs. = 22 ± 1 kJ/mol H 2 , ΔS abs. = 107 ± 2 J/K mol H 2 , and ΔH des. = 24 ± 1 kJ/mol H 2 , ΔS des. = 110 ± 3 J/K mol H 2 . The addition of 10 wt.% of expanded natural graphite (ENG) allows the improvement of the heat transfer properties, showing a reversible capacity of about 1.5 wt.%, cycling stability and hydrogenation/dehydrogenation times between 25 to 70 s. The feasibility for the utilization of the designed material in a high-pressure tank is also evaluated, considering practical design parameters.

Keywords: AB 2 alloy; hybrid; compressed hydrogen; metal hydride; hydrogen storage; thermodynamics; kinetics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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