Reversible room temperature hydrogen storage in high-entropy alloy TiZrCrMnFeNi

Author(s)

Edalati, Parisa ^[1] ; Floriano, Ricardo ^[2] ; Mohammadi, Abbas ^[1] ; Li, Yongtao ^{[3, 4]} ; Zepon, Guilherme ^[5] ; Li, Hai-Wen ^{[1, 4, 6]} ; Edalati, Kaveh ^[1]

Affiliation

^[1] Kyushu Univ, WPI I2CNER, Fukuoka 8190395 - Japan

^[2] Univ Estadual Campinas, Fac Ciencias Aplicadas, Rua Pedro Zaccaria 1300, BR-13484350 Limeira - Brazil

^[3] Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243002 - Peoples R China

^[4] Kyushu Univ, Int Res Ctr Hydrogen Energy, Fukuoka 8190395 - Japan

^[5] Univ Fed Sao Carlos, Dept Mat Engn, Rod Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[6] Kyushu Univ, Platform Inter Transdisciplinary Energy Res Q PIT, Fukuoka 8190395 - Japan

• Document type: Journal article
• Source: SCRIPTA MATERIALIA; v. 178, p. 387-390, MAR 2020.
• Web of Science Citations: 0

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 AB(2)H(3) 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. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 18/15968-4 - Synthesis and Characterization of High Entropy Alloys based on TiFe System
• Grantee: Ricardo Floriano
• Support Opportunities: Regular Research Grants