Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase Compounds

Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase Compounds

Rare-earth-based AB<sub>2</sub>-type compounds with Laves phase structure are readily subject to hydrogen-induced amorphization and disproportionation upon hydrogenation. In this work, we conducted the Sc alloying on Y<sub>0.95</sub>Ni<sub>2</sub> to improve its h...

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Main Authors: Shiqian Zhao, Hui Wang, Jiangwen Liu
Format: Article
Language:English
Published: MDPI AG 2021-01-01
Series:Materials
Subjects:
hydrogen storage alloys
hydrogen-induced amorphization
Sc substitution
reversibility
Online Access:https://www.mdpi.com/1996-1944/14/2/276
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spelling doaj-e21d29e1ab354907a997bae29e1d2abe2021-01-08T00:05:17ZengMDPI AGMaterials1996-19442021-01-011427627610.3390/ma14020276Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase CompoundsShiqian Zhao0Hui Wang1Jiangwen Liu2School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510641, ChinaSchool of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510641, ChinaSchool of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510641, ChinaRare-earth-based AB<sub>2</sub>-type compounds with Laves phase structure are readily subject to hydrogen-induced amorphization and disproportionation upon hydrogenation. In this work, we conducted the Sc alloying on Y<sub>0.95</sub>Ni<sub>2</sub> to improve its hydrogen storage properties. The results show that the amorphization degree of Y<sub>0.95</sub>Ni<sub>2</sub> deepens with the increasing hydrogenation time, pressure, and temperature. The Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> ternary compounds show a significant improvement in reversibility and dehydriding thermodynamics due to the reduced atomic radius ratio R<sub>A</sub>/R<sub>B</sub> and cell volume. Hydrogen-induced amorphization is fully eliminated in the Y<sub>0.25</sub>Sc<sub>0.7</sub>Ni<sub>2</sub>. The Y<sub>0.25</sub>Sc<sub>0.7</sub>Ni<sub>2</sub> delivers a reversible hydrogen storage capacity of 0.94 wt.% and the dissociation pressure of 0.095 MPa at the minimum dehydrogenation temperature of 100 °C.https://www.mdpi.com/1996-1944/14/2/276hydrogen storage alloyshydrogen-induced amorphizationSc substitutionreversibility
collection DOAJ
language English
format Article
sources DOAJ
author Shiqian Zhao
Hui Wang
Jiangwen Liu
spellingShingle Shiqian Zhao
Hui Wang
Jiangwen Liu
Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase Compounds
Materials
hydrogen storage alloys
hydrogen-induced amorphization
Sc substitution
reversibility
author_facet Shiqian Zhao
Hui Wang
Jiangwen Liu
author_sort Shiqian Zhao
title Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase Compounds
title_short Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase Compounds
title_full Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase Compounds
title_fullStr Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase Compounds
title_full_unstemmed Exploring the Hydrogen-Induced Amorphization and Hydrogen Storage Reversibility of Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> Laves Phase Compounds
title_sort exploring the hydrogen-induced amorphization and hydrogen storage reversibility of y(sc)<sub>0.95</sub>ni<sub>2</sub> laves phase compounds
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2021-01-01
description Rare-earth-based AB<sub>2</sub>-type compounds with Laves phase structure are readily subject to hydrogen-induced amorphization and disproportionation upon hydrogenation. In this work, we conducted the Sc alloying on Y<sub>0.95</sub>Ni<sub>2</sub> to improve its hydrogen storage properties. The results show that the amorphization degree of Y<sub>0.95</sub>Ni<sub>2</sub> deepens with the increasing hydrogenation time, pressure, and temperature. The Y(Sc)<sub>0.95</sub>Ni<sub>2</sub> ternary compounds show a significant improvement in reversibility and dehydriding thermodynamics due to the reduced atomic radius ratio R<sub>A</sub>/R<sub>B</sub> and cell volume. Hydrogen-induced amorphization is fully eliminated in the Y<sub>0.25</sub>Sc<sub>0.7</sub>Ni<sub>2</sub>. The Y<sub>0.25</sub>Sc<sub>0.7</sub>Ni<sub>2</sub> delivers a reversible hydrogen storage capacity of 0.94 wt.% and the dissociation pressure of 0.095 MPa at the minimum dehydrogenation temperature of 100 °C.
topic hydrogen storage alloys
hydrogen-induced amorphization
Sc substitution
reversibility
url https://www.mdpi.com/1996-1944/14/2/276
work_keys_str_mv AT shiqianzhao exploringthehydrogeninducedamorphizationandhydrogenstoragereversibilityofyscsub095subnisub2sublavesphasecompounds
AT huiwang exploringthehydrogeninducedamorphizationandhydrogenstoragereversibilityofyscsub095subnisub2sublavesphasecompounds
AT jiangwenliu exploringthehydrogeninducedamorphizationandhydrogenstoragereversibilityofyscsub095subnisub2sublavesphasecompounds
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