Reversible room temperature hydrogen storage in high-entropy alloy TiZrCrMnFeNi
| Autor: | Kaveh Edalati, Guilherme Zepon, Abbas Mohammadi, Hai Wen Li, Parisa Edalati, Yongtao Li, Ricardo Floriano |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Hydrogen Hydride Mechanical Engineering Alloy Metals and Alloys chemistry.chemical_element Thermodynamics 02 engineering and technology Laves phase engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrogen storage chemistry Mechanics of Materials 0103 physical sciences engineering General Materials Science Chemical stability 0210 nano-technology Valence electron CALPHAD |
| Zdroj: | Scripta Materialia. 178:387-390 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2019.12.009 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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