Fundamental hydrogen storage properties of TiFe-alloy with partial substitution of Fe by Ti and Mn

Dematteis, Erika Michela; Dreistadt, David Michael; Capurso, Giovanni; Jepsen, Julian; Cuevas, Fermín; Latroche, M.

doi:10.1016/j.jallcom.2021.159925

Cited by 44 publications

(25 citation statements)

References 38 publications

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“…Unfortunately, their hydrogen storage capacity is insufficient to qualify them for use as hydrogen storage materials. For instance, despite the fact that their gravimetric capacity is comparable to that of compounds with a high potential for commercial use (e.g., TiFe [58,59], Ti 0.95 Zr 0.05 Mn 1.46 V 0.45 Fe 0.09 [60], etc. ), their operational temperature is too high.…”

Section: Resultsmentioning

confidence: 99%

De-hydrogenation/Rehydrogenation Properties and Reaction Mechanism of AmZn(NH2)n-2nLiH Systems (A = Li, K, Na, and Rb)

et al. 2022

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With the aim to find suitable hydrogen storage materials for stationary and mobile applications, multi-cation amide-based systems have attracted considerable attention, due to their unique hydrogenation kinetics. In this work, AmZn(NH2)n (with A = Li, K, Na, and Rb) were synthesized via an ammonothermal method. The synthesized phases were mixed via ball milling with LiH to form the systems AmZn(NH2)n-2nLiH (with m = 2, 4 and n = 4, 6), as well as Na2Zn(NH2)4∙0.5NH3-8LiH. The hydrogen storage properties of the obtained materials were investigated via a combination of calorimetric, spectroscopic, and diffraction methods. As a result of the performed analyses, Rb2Zn(NH2)4-8LiH appears as the most appealing system. This composite, after de-hydrogenation, can be fully rehydrogenated within 30 s at a temperature between 190 °C and 200 °C under a pressure of 50 bar of hydrogen.

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Section: Resultsmentioning

confidence: 99%

De-hydrogenation/Rehydrogenation Properties and Reaction Mechanism of AmZn(NH2)n-2nLiH Systems (A = Li, K, Na, and Rb)

et al. 2022

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“…A drawback of TiFe is its hard activation, which usually requires thermal cycling between room temperature and high temperature (e.g., 400 • C) and/or high hydrogen pressure (≈100 bar) [65], resulting in real applications being difficult and costly. Mn-substituted TiFe alloys (Ti(Fe x Mn 1−x ) have been reported to display easy activation, no changes in gravimetric capacity until x = 0.70, and decreased plateau pressure, compared to TiFe, thanks to the increase in cell dimension due to the Mn substitution [66]. Even quaternary alloys can manifest improved hydrogenation properties, as in the case of Mn and Cu substitutions in TiFe 0.9 [67].…”

Section: Hydrides For Energy Storagementioning

confidence: 99%

Solid-State Hydrogen Storage Systems and the Relevance of a Gender Perspective

et al. 2021

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This paper aims at addressing the exploitation of solid-state carriers for hydrogen storage, with attention paid both to the technical aspects, through a wide review of the available integrated systems, and to the social aspects, through a preliminary overview of the connected impacts from a gender perspective. As for the technical perspective, carriers to be used for solid-state hydrogen storage for various applications can be classified into two classes: metal and complex hydrides. Related crystal structures and corresponding hydrogen sorption properties are reviewed and discussed. Fundamentals of thermodynamics of hydrogen sorption evidence the key role of the enthalpy of reaction, which determines the operating conditions (i.e., temperatures and pressures). In addition, it rules the heat to be removed from the tank during hydrogen absorption and to be delivered to the tank during hydrogen desorption. Suitable values for the enthalpy of hydrogen sorption reaction for operating conditions close to ambient (i.e., room temperature and 1–10 bar of hydrogen) are close to 30 kJ·molH2−1. The kinetics of the hydrogen sorption reaction is strongly related to the microstructure and to the morphology (i.e., loose powder or pellets) of the carriers. Usually, the kinetics of the hydrogen sorption reaction is rather fast, and the thermal management of the tank is the rate-determining step of the processes. As for the social perspective, the paper arguments that, as it occurs with the exploitation of other renewable innovative technologies, a wide consideration of the social factors connected to these processes is needed to reach a twofold objective: To assess the extent to which a specific innovation might produce positive or negative impacts in the recipient socioeconomic system and, from a sociotechnical perspective, to explore the potential role of the social components and dynamics in fostering the diffusion of the innovation itself. Within the social domain, attention has been paid to address the underexplored relationship between the gender perspective and the enhancement of hydrogen-related energy storage systems. This relationship is taken into account both in terms of the role of women in triggering the exploitation of hydrogen-based storage playing as experimenter and promoter, and in terms of the intertwined impact of this innovation in their current conditions, at work, and in daily life.

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“…Despite its relatively low hydrogen storage capacity (1.86 wt.%), the alloy TiFe is still considered for practical applications because of its relatively low cost and the fact that it can operate close to room temperature [7]. The alloys of type A x B y have a large range of hydrogen capacity and temperature of operation depending on the stoichiometry and constituent elements.…”

Section: Introductionmentioning

confidence: 99%

Effect of HPT on the First Hydrogenation of LaNi5 Metal Hydride

et al. 2021

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This paper reports the effect of high-pressure torsion (HPT) on the first hydrogenation of LaNi5. We found that, for loose powder, reduction of particle size has an effect of increasing the incubation time and decreasing the hydrogen capacity. A higher amount of HPT turns only marginally reduce the incubation time but has no effect on hydrogen capacity. In all cases, the first dehydrogenation and subsequent hydrogenation have the same kinetics, irrespective of the particle size or number of HPT turns. Therefore, for LaNi5, HPT has a beneficial effect only for the first hydrogenation.

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Fundamental hydrogen storage properties of TiFe-alloy with partial substitution of Fe by Ti and Mn

Cited by 44 publications

References 38 publications

De-hydrogenation/Rehydrogenation Properties and Reaction Mechanism of AmZn(NH2)n-2nLiH Systems (A = Li, K, Na, and Rb)

De-hydrogenation/Rehydrogenation Properties and Reaction Mechanism of AmZn(NH2)n-2nLiH Systems (A = Li, K, Na, and Rb)

Solid-State Hydrogen Storage Systems and the Relevance of a Gender Perspective

Effect of HPT on the First Hydrogenation of LaNi5 Metal Hydride

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