Complex Hydrides for Hydrogen Storage

Orimo, Shin Ichi; Nakamori, Yoshiteru; Eliseo, Jennifer R.; Zuettel, A.; Jensen, Craig M.

doi:10.1002/chin.200751221

Cited by 146 publications

(220 citation statements)

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“…Aluminium-based complex hydrides (alanates) composed of metal cation(s) (typically alkali or alkaline-earth metals) and a complex anion, [AlH 4 ] − or [AlH 6 ] 3− with covalent Al-H bonds, have attracted tremendous attention as hydrogen storage materials since Bogdanović and Schwickardi reported the reversible hydrogen desorption and absorption reactions on Ti-enhanced NaAlH 4 (Equation (1)) [1][2][3][4][5]. NaAlH 4 ↔ 1/3Na 3 AlH 6 + 2/3Al + H 2 (g) ↔ NaH + Al + 1/2H 2 (g)…”

Section: Introductionmentioning

confidence: 99%

“…We refer to MAlH 5 as an alkaline-earth metal penta-alanate. M(AlH 4 ) 2 → MAlH 5 + Al + 3/2H 2 (g) (2) Alanates with alkali metals, such as NaAlH 4 [1][2][3][4][5], or mixed alkali and alkaline-earth metal cations, such as LiCa(AlH 4 ) 3 [10], do not form alanates with corner-sharing AlH 6 octahedron chains. Therefore, the corner-sharing AlH 6 octahedron chains are a unique feature of alanates composed of alkaline-earth metals.…”

Section: Introductionmentioning

confidence: 99%

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Crystal Structural Determination of SrAlD5 with Corner-Sharing AlD6 Octahedron Chains by X-ray and Neutron Diffraction

et al. 2018

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Aluminium-based complex hydrides (alanates) composed of metal cation(s) and complex anion(s), [AlH 4 ] − or [AlH 6 ] 3− with covalent Al-H bonds, have attracted tremendous attention as hydrogen storage materials since the discovery of the reversible hydrogen desorption and absorption reactions on Ti-enhanced NaAlH 4 . In cases wherein alkaline-earth metals (M) are used as a metal cation, MAlH 5 with corner-sharing AlH 6 octahedron chains are known to form. The crystal structure of SrAlH 5 has remained unsolved although two different results have been theoretically and experimentally proposed. Focusing on the corner-sharing AlH 6 octahedron chains as a unique feature of the alkaline-earth metal, we here report the crystal structure of SrAlD 5 investigated by synchrotron radiation powder X-ray and neutron diffraction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Crystal Structural Determination of SrAlD5 with Corner-Sharing AlD6 Octahedron Chains by X-ray and Neutron Diffraction

et al. 2018

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“…The complex hydrides are attractive due to a wide variety of functionalities, such as hydrogen storage, superconductivity, fast ionic conductivity, magnetism, and metal-insulator transition [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

In-situ powder neutron diffraction study on the formation process of LaMg 2 NiH 7

Sato

Ikeda

Matsuo

et al. 2017

International Journal of Hydrogen Energy

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The formation process from the intermetallic compound LaMg2Ni to a complex hydride (deuteride) LaMg2NiD7 composed of La 3+ , 2×Mg 2+ , [NiD4] 4-, and 3×D -was investigated by in-situ powder neutron diffraction under deuterium gas pressure at room temperature. Below 0.001 MPa, small amount of deuterium was initially dissolved in the lattice of LaMg2Ni forming LaMg2NiD0.05 and two new hydride phases (LaMg2NiD x 1 and LaMg2NiD x 2) were continuously yielded. Furthermore, LaMg2NiD4.6 with NiD1.9 and NiD3.3 units and interstitial deuterium atoms was formed prior to appearing of LaMg2NiD7. From their Bragg peak positions, the deuterium contents x1, and x2 were inferred as 0.05 < x1 < x2 < 4.6. At approximately 0.001 MPa, LaMg2NiD7 started forming. Since the intermediate deuterides had similar metal atomic framework of LaMg2Ni, we revealed that LaMg2NiD7 formation proceeded through multiple deuteride phases with maintaining of the metal atomic framework of LaMg2Ni.

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“…Compact and safe way to store hydrogen is necessary [1], and one of the candidates is hydrogen storage in solid materials which possess high volumetric hydrogen capacity. Complex hydrides, e.g., metal alanates M(AlH 4 ) x where hydrogen is covalently bonded with Al to make complex anion, have high gravimetric hydrogen capacity and have been studied as one of the most promising hydrogen storage materials [2].…”

Section: Introductionmentioning

confidence: 99%