Scaling up the magnetocaloric hydrogen liquefaction technology by light rare-earth Laves phases

New publication


W. Liu, T. Gottschall, F. Scheibel, E. Bykov, N. Fortunato, A.Aubert, H. Zhang, K. Skokov, O. Gutfleisch
Designing magnetocaloric materials for hydrogen liquefaction with light rare-earth Laves phases
J. Phys. Energy 5 034001 (2023).

The magnetocaloric hydrogen liquefaction technology has the potential to revolutionize the liquid hydrogen industry with its high efficiency. While heavy rare-earth materials exhibit excellent magnetocaloric performance, their criticality makes them unsuitable for large-scale applications. In contrast, light rare-earth metals are less critical, making their alloys attractive for scaling up the magnetocaloric hydrogen liquefaction technology. In this study, we have successfully designed a light rare-earth based Laves phase system, (R,R')Al¬2 (R: Pr, R': Nd, Ce), which demonstrates significant magnetic entropy and adiabatic temperature changes within the temperature range of 20 to 77 K. Our design not only presents a highly competitive light rare-earth based material system for magnetocaloric hydrogen liquefaction but also highlights the efficacy of mixing light rare-earth elements on the rare-earth sublattice to tailor the magnetocaloric effects of these materials.

DOI 10.1088/2515-7655/accb0b