Mechanism and microstructural evolution of TiCrVFe hydrogen storage alloys upon de-/hydrogenation

Hu, Huazhou; Ma, Chuanming; Chen, Qingjun

doi:10.1016/j.jallcom.2021.160315

Cited by 34 publications

(13 citation statements)

References 27 publications

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“…The kinetic equations regarding the hydrogen absorption were investigated. Calculations were performed for three different reaction models: kt = 1 – (1 – α) 1/3 , kt = 1 – 2α/3 – (1 – α) 2/3 , and n ln t = (−ln(1 – α) 1/ n ), which were influenced by surface chemistry, diffusion, and the nucleation growth mechanism, respectively. Figure c,d depicts the curves obtained from the Ti 0.8 Zr 0.2 Cr 0.75 Mn 1.25 and Ti 0.8 Zr 0.2 Cr 0.75 Mn 1.25 Ce 0.02 alloys as a function of the diffusion model control.…”

Section: Resultsmentioning

confidence: 99%

“…Hydrogen has great potential of becoming an ideal energy carrier in the future because it is abundant and environmentally friendly and has a high calorific value per unit mass. − The development of safe and efficient hydrogen storage technologies is critical for the large-scale application of hydrogen, such as in fuel cell vehicles. Storing hydrogen in a solid-state medium is considered one of the safest and most effective ways to achieve the widespread application of hydrogen in the future. − …”

Section: Introductionmentioning

confidence: 99%

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Ce-Doped TiZrCrMn Alloys for Enhanced Hydrogen Storage

Zhou

et al. 2022

Energy Fuels

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Hydrogen storage is one of the key steps that restricts the large-scale application of hydrogen energy and fuel cells. In this work, we developed an efficient H2 storage material by Ce doping in the TiZrCrMn alloy and systemically studied the effect of Ce on the microstructure, activation, and hydrogen storage properties. The results indicated that Ce addition in the Ti0.8Zr0.2Cr0.75Mn1.25 alloy did not change the major phase structure of Laves C14 but slightly increased the lattice constants and resulted in the formation of a CeO2 phase. It is interesting to find that Ce inhibited the enrichment of the Ti phase, inducing a homogeneous elemental distribution throughout the alloy. Hydrogenation and dehydrogenation tests indicated that the Ce-added alloy exhibited H2 absorption and effective desorption capacities of up to 1.98 and 1.79 wt %, respectively, higher than those of TiZrCrMn alloys reported in the literature. Ce also improved the activation of the alloy at room temperature and enhanced the cyclic performance during the hydrogenation and dehydrogenation. The activation energy, enthalpy change, and entropy change of the alloys upon hydrogenation and dehydrogenation were calculated and a small change was observed after Ce addition.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ce-Doped TiZrCrMn Alloys for Enhanced Hydrogen Storage

Zhou

et al. 2022

Energy Fuels

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“…When the addition amount of La is 1 wt %, there is no obvious La enrichment in the alloy. A lot of studies conclude that the improvement of the compositional homogeneity of the alloy is conducive to enhancing the hydrogen storage properties. ,, The addition of 1 wt % La does not affect the homogeneous composition (Figure ) and phase structure (Figure ) of the alloy, and 1 wt % La is selected as the optimum doping content.…”

Section: Resultsmentioning

confidence: 99%

“…Hydrogen is a promising energy carrier to meet the future global carbon emission reduction target. , Efficient hydrogen storage material development is a key link in hydrogen energy. − Hydrogen storage alloys have been considered as one of the most promising ways due to their high gravimetric and volumetric capacities and reasonable economics. − …”

Section: Introductionmentioning

confidence: 99%

Effect of La Doping on Kinetic and Thermodynamic Performances of Ti_1.2CrMn Alloy upon De/Hydrogenation

Zhang¹,

Ye²,

Wu³

et al. 2022

ACS Omega

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Development of efficient hydrogen storage materials is one of the great challenges in the area of hydrogen energy and fuel cells. Herein, a La-doped Ti 1.2 CrMn alloy with high hydriding capacity (2.1 wt % H) and dehydriding capacity (1.8 wt % H) was successfully developed. The crystallographic characteristics, microstructural evolution, and hydrogen storage mechanisms of the alloy were investigated systematically. It was found that the introduction of La increased the cell volume of alloy and thus improved the hydrogenation kinetic, practical hydrogenation capacity, and cyclic property. The hydrogenation kinetic results of the La-doped alloy indicate that it exhibited a higher hydrogenation rate than that of the La-free alloy. It is ascribed to the formation of LaH 3 , which provides a fast diffusion channel for hydrogen atoms to enter the alloy matrix. The dehydrogenation enthalpy (ΔH) of the La-doped alloy was calculated by the van't Hoff equation and PCT curves to be ∼18.2 kJ/mol. The cycle test proves that the La-doped Ti 1.2 CrMn alloy, due to La addition, reduces the lattice expansion and lattice stress and exhibits excellent durability.

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“…Many types of alloys have been developed for hydrogen compression over the past decades, mainly including V-based solid solutions, AB 5 -type alloys, and AB 2 -type alloys. Although AB-type Ti-Fe-based intermetallic compounds show significant hydrogen storage capacity for such applications, few investigations are intended for application of the alloys in MHHCs due to their fatal disadvantages of difficult activation, poor cycling performances, and low hydrogen ab-/desorption pressure despite improvement by substitution with alkaline earths , and transition metals. − V-based solid solutions show high gravimetric hydrogen storage capacity and fast hydrogen ab-/desorption kinetics, , whereas poor reversibility − and plateau characteristics − may hinder the alloys from utilization in MHHCs. Especially, the low hydrogen pressure and significant hysteresis of V-based solid solutions contribute to the rather high operating temperatures of MHHCs.…”

Section: Introductionmentioning

confidence: 99%

Development of (Ti–Zr)_1.02(Cr–Mn–Fe)₂-Based Alloys toward Excellent Hydrogen Compression Performance in Water-Bath Environments

Cao

Piao

Xiao

et al. 2023

ACS Appl. Energy Mater.

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Three series of alloys, Ti 0.92 Zr 0.10 Cr 1.7−x Mn 0.3 Fe x (x = 0.2−0.4), Ti 0.92 Zr 0.10 Cr 1.6−y Mn y Fe 0.4 (y = 0.1−0.7), and Ti 0.92+z Zr 0.10−z Cr 1.3 Mn 0.3 Fe 0.4 (z = 0, 0.015, 0.04), were prepared by induction levitation melting for a metal hydride hydrogen compressor from 8 to 20 MPa at water-bath temperature, with investigation on their crystal structural characteristics and hydrogen storage properties. The results show that a single C14-Laves phase with homogeneous element distribution exists in all of the alloys. The hydrogen ab-/ desorption plateau of the alloys is increased as the Fe, Mn, or Ti content increases due to decrement of the interstitial site radius originated from the respective atomic size. The hydrogen storage capacity of the alloys also correlates negatively with the hydrogen affinity of interstitial sites due to the influence of the element electronegativity. In a comprehensive consideration of the hydrogen storage performance for application, the Ti 0.935 Zr 0.085 Cr 1.3 Mn 0.3 Fe 0.4 alloy shows saturated hydrogenation under 8 MPa at 293 K and dehydrogenation around 24.91 MPa pressure at 363 K with a hydrogen capacity of 1.74 wt %, as well as excellent cycling performance and mere hysteresis. The Ti 0.92 Zr 0.10 Cr 1.0 Mn 0.6 Fe 0.4 alloy is another promising candidate with a remarkable hydrogen capacity of 1.86 wt % at 283 K and a dehydrogenation pressure of 27.94 MPa at 363 K, together with a satisfactory cycling durability. This study can guide the compositional design of AB 2 -type hydrogen storage alloys for hydrogen compression application.

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Mechanism and microstructural evolution of TiCrVFe hydrogen storage alloys upon de-/hydrogenation

Cited by 34 publications

References 27 publications

Ce-Doped TiZrCrMn Alloys for Enhanced Hydrogen Storage

Ce-Doped TiZrCrMn Alloys for Enhanced Hydrogen Storage

Effect of La Doping on Kinetic and Thermodynamic Performances of Ti_1.2CrMn Alloy upon De/Hydrogenation

Development of (Ti–Zr)_1.02(Cr–Mn–Fe)₂-Based Alloys toward Excellent Hydrogen Compression Performance in Water-Bath Environments

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Mechanism and microstructural evolution of TiCrVFe hydrogen storage alloys upon de-/hydrogenation

Cited by 34 publications

References 27 publications

Ce-Doped TiZrCrMn Alloys for Enhanced Hydrogen Storage

Ce-Doped TiZrCrMn Alloys for Enhanced Hydrogen Storage

Effect of La Doping on Kinetic and Thermodynamic Performances of Ti1.2CrMn Alloy upon De/Hydrogenation

Development of (Ti–Zr)1.02(Cr–Mn–Fe)2-Based Alloys toward Excellent Hydrogen Compression Performance in Water-Bath Environments

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Effect of La Doping on Kinetic and Thermodynamic Performances of Ti_1.2CrMn Alloy upon De/Hydrogenation

Development of (Ti–Zr)_1.02(Cr–Mn–Fe)₂-Based Alloys toward Excellent Hydrogen Compression Performance in Water-Bath Environments