Reversible room temperature hydrogen storage in high-entropy alloy TiZrCrMnFeNi. (15th March 2020)

• Record Type: Journal Article
• Authors: Edalati, Parisa; Floriano, Ricardo; Mohammadi, Abbas; Li, Yongtao; Zepon, Guilherme; Li, Hai-Wen; Edalati, Kaveh
• Is Part Of: Scripta materialia. Number 178(2020)
• Page Start: 387
• Page End: 390
• Publication Date: 2020-03-15
• Subjects: Metal hydrides -- Hydrogen storage -- High-entropy alloys (HEAs) -- C14 Laves phase -- CALPHAD (calculation of phase diagram) method; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.12.009
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Despite potential of hydride-forming alloys for hydrogen storage, there have been few alloys which can reversibly store hydrogen without heating or activation treatment. In this study, a high-entropy alloy is designed for room temperature hydrogen storage based on three criteria: total valence electron concentration (VEC) of 6.4, single-phase thermodynamic stability (examined by CALPHAD calculations) and AB2 H3 hydride formation (A: hydride-forming elements, B: elements without affinity to hydrogen, H: hydrogen). The designated alloy, TiZrCrMnFeNi containing 95 wt% C14 Laves phase, absorbs and desorbs 1.7 wt% of hydrogen (hydrogen-to-metal ratio: 1) at room temperature with a fast kinetics and without activation treatment. Graphical abstract: Image, graphical abstract