Abstract
High entropy alloys (HEAs), as a promising metallic material, are comprised of five or more elements in equal or close to equal atomic fractions, which is received more and more attention due to its multi-principal-element effects. Moreover, solid solution phase and severe lattice distortion characteristics of HEAs are particularly beneficial to hydrogen storage. In this study, a new hexanary HEA TiZrFeMnCrV with single C14 Laves phase was prepared by arc melting and mechanical milling. The TiZrFeMnCrV alloy has super-fast hydrogen absorption kinetics and can absorb hydrogen 1.80 wt.% under mild conditions of 30 °C. The TiZrFeMnCrV alloy has excellent absorption/desorption cycling performance, and the capacity still stabilizes at around 1.76 wt.% during the 50 cycles. The design of high entropy alloy can provide guidance for the new type of hydrogen storage materials.
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