The crystal structures in hydrogen absorption reactions of REMgNi4-based alloys (RE: Rare-earth metals)

Toyoto Sato; Shin Ichi Orimo

doi:10.3390/en14238163

The crystal structures in hydrogen absorption reactions of REMgNi₄-based alloys (RE: Rare-earth metals)

Toyoto Sato, Shin Ichi Orimo

研究成果: ジャーナルへの寄稿 › 総説 › 査読

8 被引用数 (Scopus)

抄録

REMgNi₄-based alloys, RE_(2−x) Mg_x Ni₄ (RE: rare-earth metals; 0 < x < 2), with a AuBe₅-type crystal structure, exhibit reversible hydrogen absorption and desorption reactions, which are known as hydrogen storage properties. These reactions involve formation of three hydride phases. The hydride formation pressures and hydrogen storage capacities are related to the radii of the RE_(2−x) Mg_x Ni₄, which in turn are dependent on the radii and compositional ratios of the RE and Mg atoms. The crystal structures formed during hydrogen absorption reactions are the key to understanding the hydrogen storage properties of RE_(2−x) Mg_x Ni₄. Therefore, in this review, we provide an overview of the crystal structures in the hydrogen absorption reactions focusing on RE_(2−x) Mg_x Ni₄.

本文言語	英語
論文番号	8163
ジャーナル	Energies
巻	14
号	23
DOI	https://doi.org/10.3390/en14238163
出版ステータス	出版済み - 2021 12月 1

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title = "The crystal structures in hydrogen absorption reactions of REMgNi4-based alloys (RE: Rare-earth metals)",

abstract = "REMgNi4-based alloys, RE(2−x) Mgx Ni4 (RE: rare-earth metals; 0 < x < 2), with a AuBe5-type crystal structure, exhibit reversible hydrogen absorption and desorption reactions, which are known as hydrogen storage properties. These reactions involve formation of three hydride phases. The hydride formation pressures and hydrogen storage capacities are related to the radii of the RE(2−x) Mgx Ni4, which in turn are dependent on the radii and compositional ratios of the RE and Mg atoms. The crystal structures formed during hydrogen absorption reactions are the key to understanding the hydrogen storage properties of RE(2−x) Mgx Ni4. Therefore, in this review, we provide an overview of the crystal structures in the hydrogen absorption reactions focusing on RE(2−x) Mgx Ni4.",

keywords = "Crystal structures, Hydrides, Hydrogen storage materials",

author = "Toyoto Sato and Orimo, \{Shin Ichi\}",

note = "Funding Information: Funding: This research was funded by JST SICORP, grant number JPMJSC 1802 and MEXT/JSPS KAKENHI “Hydrogenomics”, grant number JP18H05513. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/en14238163",

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T1 - The crystal structures in hydrogen absorption reactions of REMgNi4-based alloys (RE: Rare-earth metals)

AU - Sato, Toyoto

AU - Orimo, Shin Ichi

N1 - Funding Information: Funding: This research was funded by JST SICORP, grant number JPMJSC 1802 and MEXT/JSPS KAKENHI “Hydrogenomics”, grant number JP18H05513. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/12/1

Y1 - 2021/12/1

N2 - REMgNi4-based alloys, RE(2−x) Mgx Ni4 (RE: rare-earth metals; 0 < x < 2), with a AuBe5-type crystal structure, exhibit reversible hydrogen absorption and desorption reactions, which are known as hydrogen storage properties. These reactions involve formation of three hydride phases. The hydride formation pressures and hydrogen storage capacities are related to the radii of the RE(2−x) Mgx Ni4, which in turn are dependent on the radii and compositional ratios of the RE and Mg atoms. The crystal structures formed during hydrogen absorption reactions are the key to understanding the hydrogen storage properties of RE(2−x) Mgx Ni4. Therefore, in this review, we provide an overview of the crystal structures in the hydrogen absorption reactions focusing on RE(2−x) Mgx Ni4.

AB - REMgNi4-based alloys, RE(2−x) Mgx Ni4 (RE: rare-earth metals; 0 < x < 2), with a AuBe5-type crystal structure, exhibit reversible hydrogen absorption and desorption reactions, which are known as hydrogen storage properties. These reactions involve formation of three hydride phases. The hydride formation pressures and hydrogen storage capacities are related to the radii of the RE(2−x) Mgx Ni4, which in turn are dependent on the radii and compositional ratios of the RE and Mg atoms. The crystal structures formed during hydrogen absorption reactions are the key to understanding the hydrogen storage properties of RE(2−x) Mgx Ni4. Therefore, in this review, we provide an overview of the crystal structures in the hydrogen absorption reactions focusing on RE(2−x) Mgx Ni4.

KW - Crystal structures

KW - Hydrides

KW - Hydrogen storage materials

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