Enhanced Hydrogen Storage Properties of Li-RHC System with In-House Synthesized AlTi 3 Nanoparticles

Thi-Thu Le, Claudio Pistidda, Julián Puszkiel, María Victoria Castro Riglos, David Michael Dreistadt, Thomas Klassen and Martin Dornheim
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Thi-Thu Le: Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon GmbH, D-21502 Geesthacht, Germany
Claudio Pistidda: Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon GmbH, D-21502 Geesthacht, Germany
Julián Puszkiel: Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon GmbH, D-21502 Geesthacht, Germany
María Victoria Castro Riglos: Department of Metalphysics, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Centro Atómico Bariloche, San Carlos de Bariloche R8402AGP, Argentina
David Michael Dreistadt: Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon GmbH, D-21502 Geesthacht, Germany
Thomas Klassen: Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon GmbH, D-21502 Geesthacht, Germany
Martin Dornheim: Institute of Hydrogen Technology, Helmholtz-Zentrum Hereon GmbH, D-21502 Geesthacht, Germany

Energies, 2021, vol. 14, issue 23, 1-16

Abstract: In recent years, the use of selected additives for improving the kinetic behavior of the system 2LiH + MgB 2 (Li-RHC) has been investigated. As a result, it has been reported that some additives (e.g., 3TiCl 3 ·AlCl 3 ), by reacting with the Li-RHC components, form nanostructured phases (e.g., AlTi 3 ) possessing peculiar microstructural properties capable of enhancing the system’s kinetic behavior. The effect of in-house-produced AlTi 3 nanoparticles on the hydrogenation/dehydrogenation kinetics of the 2LiH + MgB 2 (Li-RHC) system is explored in this work, with the aim of reaching high hydrogen storage performance. Experimental results show that the AlTi 3 nanoparticles significantly improve the reaction rate of the Li-RHC system, mainly for the dehydrogenation process. The observed improvement is most likely due to the similar structural properties between AlTi 3 and MgB 2 phases which provide an energetically favored path for the nucleation of MgB 2 . In comparison with the pristine material, the Li-RHC doped with AlTi 3 nanoparticles has about a nine times faster dehydrogenation rate. The results obtained from the kinetic modeling indicate a change in the Li-RHC hydrogenation reaction mechanism in the presence of AlTi 3 nanoparticles.

Keywords: in-house-synthesized additive; AlTi 3 nanoparticles; kinetics; reaction mechanism; reactive hydride composite (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: 2021
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