Reversible room temperature hydrogen storage in high-entropy alloy TiZrCrMnFeNi

Parisa Edalati, Ricardo Floriano, Abbas Mohammadi, Yongtao Li, Guilherme Zepon, Hai Wen Li, Kaveh Edalati

Research output: Contribution to journalArticlepeer-review

129 Citations (Scopus)


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 AB2H3 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.

Original languageEnglish
Pages (from-to)387-390
Number of pages4
JournalScripta Materialia
Publication statusPublished - Mar 15 2020

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys


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