Tuning Hydrogen Storage Properties in La 1−x Y x Ni 4.5 Cu 0.5 (x = 0.1; 0.2; 0.3; 0.4, 0.5) Alloys

Mateusz Mańka, Tomohiro Kinoshita, Anita Nowak, Aleksandra Ludwik, Alicja Klimkowicz, Akito Takasaki and Łukasz Gondek ()
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Mateusz Mańka: Faculty of Energy and Fuels, AGH University of Krakow, Mickiewicza 30, 30-059 Krakow, Poland
Tomohiro Kinoshita: Department of Engineering Science and Mechanics, Shibaura Institute of Technology, Toyosu, Koto-ku, Tokyo 135-8548, Japan
Anita Nowak: Faculty of Physics and Applied Computer Science, AGH University of Krakow, Mickiewicza 30, 30-059 Krakow, Poland
Aleksandra Ludwik: Faculty of Physics and Applied Computer Science, AGH University of Krakow, Mickiewicza 30, 30-059 Krakow, Poland
Alicja Klimkowicz: Department of Engineering Science and Mechanics, Shibaura Institute of Technology, Toyosu, Koto-ku, Tokyo 135-8548, Japan
Akito Takasaki: Department of Engineering Science and Mechanics, Shibaura Institute of Technology, Toyosu, Koto-ku, Tokyo 135-8548, Japan
Łukasz Gondek: Faculty of Physics and Applied Computer Science, AGH University of Krakow, Mickiewicza 30, 30-059 Krakow, Poland

Energies, 2023, vol. 17, issue 1, 1-11

Abstract: Metal hydrides of AB5 compositions have been investigated over the years as they offer extraordinary volumetric hydrogen densities with high cycling stability and purity of released hydrogen. Moreover, by doping with different elements, the sorption properties of alloys can be significantly changed according to their foreseen applications. In this contribution, we report the synthesis routes and hydrogenation characteristics of La 1−x Y x Ni 4.5 Cu 0.5 . The synthesized alloys exhibit excellent structural purity with all reflections indexed by the hexagonal P6/mmm structure. It was found that the Y content can easily tune (raise) the equilibrium pressures of the pressure–composition isotherms, while overall gravimetric density remains at a level exceeding 1.5 wt.% up to x = 0.3 then strongly decreases. The pressure range for desorption can be tuned from 1.5 to 5 bars at room temperature. Some alloys (x = 0; 0.2) exhibit very good stability during 1000 cycles of hydrogen loading and unloading. Furthermore, activation of the alloys is prompt, making them good candidates for stationary hydrogen storage, non-mechanical hydrogen compressors, or soft actuators.

Keywords: hydrogen storage; AB5 alloys; metal hydrides (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: 2023
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