ISIS Neutron and Muon Source Data Journal

Mechanism of hydrogen residue in metal hydrides formed from high-entropy alloys by inelastic neutron spectroscopy

Abstract: High-entropy alloys (HEAs) typically contain four or more principle elements in equimolar amounts. We have recently discovered the first bcc HEA-based hydride with reversible hydrogen storage capacity at room-temperature, TiVCrNbH8. In addition, this material excels at many of the traditional showstoppers for applied hydrogen storage in intermetallic hydrides, i.e. degradation after repeated hydrogen absorption/desorption cycling, surface passivation and slow hydrogen sorption kinetics. This material is therefore promising as a future hydrogen storage material. However, the reversible capacity is 1.96 wt.% H2 while the full capacity in TiVCrNbH8 is 3.14 wt.% H2. This means that there are certain interstitial sites within the metal matrix where the H-atoms are bound more tightly than others. If these sites can be destabilized, the full hydrogen storage capacity of would become accessible.

Principal Investigator: Dr Øystein Slagtern Fjellvåg
Experimenter: Professor Bjorn Hauback
Experimenter: Dr Jeff Armstrong
Experimenter: Mr Magnus Moe Nygård

DOI: 10.5286/ISIS.E.RB1920331

ISIS Experiment Number: RB1920331

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Øystein Slagtern Fjellvåg et al; (2019): Mechanism of hydrogen residue in metal hydrides formed from high-entropy alloys by inelastic neutron spectroscopy, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1920331

Data is released under the CC-BY-4.0 license.