Synthesis and characterization of two new amide chloride compounds: Potential H2 storage materials

Davies, Rosalind A.; Anderson, Paul A.

doi:10.1016/j.ijhydene.2014.12.044

Cited by 11 publications

(16 citation statements)

References 10 publications

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“…These compounds were reported to have faster hydrogen desorption kinetics than the halide-free system. LiNH 2 has the same decomposition temperature but additional NH 3 was detected in addition to H 2 [85]. The halide anion is believed to increase hydrogen mobility in the system.…”

Section: Binary Phases Of Hydrides With Lithium Halidesmentioning

confidence: 92%

“…The heat treatment of LiNH 2 and LiCl (molar ratio = 1:3) resulted in the formation of rhombohedral and cubic polymorphs of Li 4 (NH 2 ) 3 Cl, and at lower LiCl ratios, Li 7 (NH 2 ) 6 Cl formed [85]. These compounds were reported to have faster hydrogen desorption kinetics than the halide-free system.…”

Section: Binary Phases Of Hydrides With Lithium Halidesmentioning

confidence: 99%

“…The halide anion is believed to increase hydrogen mobility in the system. In addition, Li sites in the structure are not completely occupied which might increase Li + mobility and thus result in a higher ionic conductivity [85].…”

Section: Binary Phases Of Hydrides With Lithium Halidesmentioning

confidence: 99%

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A Review of the MSCA ITN ECOSTORE—Novel Complex Metal Hydrides for Efficient and Compact Storage of Renewable Energy as Hydrogen and Electricity

et al. 2020

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Hydrogen as an energy carrier is very versatile in energy storage applications. Developments in novel, sustainable technologies towards a CO2-free society are needed and the exploration of all-solid-state batteries (ASSBs) as well as solid-state hydrogen storage applications based on metal hydrides can provide solutions for such technologies. However, there are still many technical challenges for both hydrogen storage material and ASSBs related to designing low-cost materials with low-environmental impact. The current materials considered for all-solid-state batteries should have high conductivities for Na+, Mg2+ and Ca2+, while Al3+-based compounds are often marginalised due to the lack of suitable electrode and electrolyte materials. In hydrogen storage materials, the sluggish kinetic behaviour of solid-state hydride materials is one of the key constraints that limit their practical uses. Therefore, it is necessary to overcome the kinetic issues of hydride materials before discussing and considering them on the system level. This review summarizes the achievements of the Marie Skłodowska-Curie Actions (MSCA) innovative training network (ITN) ECOSTORE, the aim of which was the investigation of different aspects of (complex) metal hydride materials. Advances in battery and hydrogen storage materials for the efficient and compact storage of renewable energy production are discussed.

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Section: Binary Phases Of Hydrides With Lithium Halidesmentioning

confidence: 92%

Section: Binary Phases Of Hydrides With Lithium Halidesmentioning

confidence: 99%

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A Review of the MSCA ITN ECOSTORE—Novel Complex Metal Hydrides for Efficient and Compact Storage of Renewable Energy as Hydrogen and Electricity

et al. 2020

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“…a = 9.7367 Å. b = 8.9307 Å) and Li 6 Mg 0.5 (NH 2 ) 6 Cl (SG = R3. a = 9.756 Å. b = 8.9448 Å) have been synthesized and characterized as potential hydrogen storage materials [30]. Both phases, when heated with LiH (1:1), released hydrogen at lower temperatures (150 • C and 200 • C), with no emission of ammonia gas and faster kinetics if compared with the pristine Li-N-H system (220 • C).…”

Section: Li-n-h Systemmentioning

confidence: 99%

Recent Progress and New Perspectives on Metal Amide and Imide Systems for Solid-State Hydrogen Storage

et al. 2018

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Hydrogen storage in the solid state represents one of the most attractive and challenging ways to supply hydrogen to a proton exchange membrane (PEM) fuel cell. Although in the last 15 years a large variety of material systems have been identified as possible candidates for storing hydrogen, further efforts have to be made in the development of systems which meet the strict targets of the Fuel Cells and Hydrogen Joint Undertaking (FCH JU) and U.S. Department of Energy (DOE). Recent projections indicate that a system possessing: (i) an ideal enthalpy in the range of 20-50 kJ/mol H 2 , to use the heat produced by PEM fuel cell for providing the energy necessary for desorption; (ii) a gravimetric hydrogen density of 5 wt. % H 2 and (iii) fast sorption kinetics below 110 • C is strongly recommended. Among the known hydrogen storage materials, amide and imide-based mixtures represent the most promising class of compounds for on-board applications; however, some barriers still have to be overcome before considering this class of material mature for real applications. In this review, the most relevant progresses made in the recent years as well as the kinetic and thermodynamic properties, experimentally measured for the most promising systems, are reported and properly discussed.

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“…observed alone at x = 0.57, and has been characterised, through Rietveld refinement, as Li 7 (NH 2 ) 6 Cl [12,13]. The unit cell volume of Li 7 (NH 2 ) 6 Cl varied slightly in the range x = 0.5-0.7 suggesting that some deviation from the ideal stoichiometry may be possible, but much of the chloride excess was accommodated in the cubic phase for the x = 0.7 sample, and the chloride deficiency in an additional rhombohedral phase with a smaller unit cell for the x = 0.5 sample.…”

Section: Lithium Amide Chloridementioning

confidence: 99%

Phase space investigation of the lithium amide halides

Davies

Hewett

Korkiakoski

et al. 2015

Journal of Alloys and Compounds

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a b s t r a c tAn investigation has been carried out into the lower limits of halide incorporation in lithium amide (LiNH 2 ). It was found that the lithium amide iodide Li 3 (NH 2 ) 2 I was unable to accommodate any variation in stoichiometry. In contrast, some variation in stoichiometry was accommodated in Li 7 (NH 2 ) 6 Br, as shown by a decrease in unit cell volume when the bromide content was reduced. The amide chloride Li 4 (NH 2 ) 3 Cl was found to adopt either a rhombohedral or a cubic structure depending on the reaction conditions. Reduction in chloride content generally resulted in a mixture of phases, but a new rhombohedral phase with the stoichiometry Li 7 (NH 2 ) 6 Cl was observed. In comparison to LiNH 2 , this new lowchloride phase exhibited similar improved hydrogen desorption properties as Li 4 (NH 2 ) 3 Cl but with a much reduced weight penalty through addition of chloride. Attempts to dope lithium amide with fluoride ions have so far proved unsuccessful.Ó 2015 Published by Elsevier B.V.

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Synthesis and characterization of two new amide chloride compounds: Potential H2 storage materials

Cited by 11 publications

References 10 publications

A Review of the MSCA ITN ECOSTORE—Novel Complex Metal Hydrides for Efficient and Compact Storage of Renewable Energy as Hydrogen and Electricity

A Review of the MSCA ITN ECOSTORE—Novel Complex Metal Hydrides for Efficient and Compact Storage of Renewable Energy as Hydrogen and Electricity

Recent Progress and New Perspectives on Metal Amide and Imide Systems for Solid-State Hydrogen Storage

Phase space investigation of the lithium amide halides

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