Understanding crystal structure roles towards developing high-performance V-free BCC hydrogen storage alloys

Hu, Huazhou; Ma, Chuanming; Zhou, Lu; Xiao, Houqun; Chen, Qingjun

doi:10.1016/j.ijhydene.2022.05.241

Cited by 16 publications

(11 citation statements)

References 38 publications

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“…Similar volume contraction with Mo addition has been reported elsewhere, e.g., Ti 0.30 V 0.25 Zr 0.10 Nb 0.25 Mo 0.10 and Ti 0.20 Zr 0.20 Hf 0.20 Mo 0.40 . Additionally, the formation of the bcc structure in Al 0.05 (TiVNb) 0.95– x Mo x ( x = 0.05, 0.10) can be explained by the stabilizing effect of Mo, Nb, and V on the bcc phase when alloyed with Ti (hcp-Ti at RT and bcc-Ti in the molten state above 832 °C) as reported for some traditional bcc alloys , and HEAs . Also, Al acts as a bcc stabilizer as was earlier proven for similar compositions like Al x NbTiMoV …”

Section: Resultssupporting

confidence: 81%

Large Destabilization of (TiVNb)-Based Hydrides via (Al, Mo) Addition: Insights from Experiments and Data-Driven Models

Pineda Romero,

Witman,

Harvey

et al. 2023

ACS Appl. Energy Mater.

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Section: Resultssupporting

confidence: 81%

Large Destabilization of (TiVNb)-Based Hydrides via (Al, Mo) Addition: Insights from Experiments and Data-Driven Models

Pineda Romero,

Witman,

Harvey

et al. 2023

ACS Appl. Energy Mater.

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“…Hence, reducing the Mo content in the alloy becomes imperative. However, when the Mo content is excessively low, the alloy tends to form a Laves phase with limited hydrogen storage sites …”

Section: Introductionmentioning

confidence: 99%

“…12 Our previous investigation also revealed that complete substitution of V with Mo in the Ti 0.4 Cr 0.5 Mo 0.1 alloy resulted in significant lattice strain and discrepancies in dislocation density, leading to oblique PCT curves due to the significant melting point difference among alloy components. 13 Additionally, the presence of a large amount of high melting point Mo in the alloy makes mass production challenging through induction melting. Hence, reducing the Mo content in the alloy becomes imperative.…”

Section: Introductionmentioning

confidence: 99%

“…However, when the Mo content is excessively low, the alloy tends to form a Laves phase with limited hydrogen storage sites. 13 In our previous research, we utilized suction casting to develop low-V Ti 45 Cr 50 V 5 alloy that achieve a single BCC structure and enhance the theoretical hydrogen storage density. 14 Okada et al also prepared a BCC-type low-V alloy by heat-treated at 1400 °C and quenched into water.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, Kubo et al developed a TiCr 1.6 Mo 0.2 alloy with low hydrogen absorption capacity and a high hydrogen desorption pressure, making it unsuitable for practical applications . Our previous investigation also revealed that complete substitution of V with Mo in the Ti 0.4 Cr 0.5 Mo 0.1 alloy resulted in significant lattice strain and discrepancies in dislocation density, leading to oblique PCT curves due to the significant melting point difference among alloy components . Additionally, the presence of a large amount of high melting point Mo in the alloy makes mass production challenging through induction melting.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Hydrogen Storage Behavior of TiCrMo Alloys Fabricated via Melt Spinning

Hu,

Li,

Zhou

et al. 2023

ACS Appl. Energy Mater.

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High-density hydrogen storage materials are crucial for the advancement of hydrogen energy. This work investigates the synthesis and characterization of a low-cost and high-performance Ti 45 Cr 52 Mo 3 alloy through arc-melting and melt-spinning processes. The alloy exhibits a significant dehydriding density of 2.4 wt % at 85 °C, indicating its potential as a hydrogen storage material. A comprehensive analysis of the alloy's microstructural evolution, de/hydrogenation thermodynamics, and cyclic properties has been conducted. The melt-spinning process improves compositional uniformity and restricts the β-Ti phase transformation in the low-Mo alloy. Consequently, the hydrogen absorption capacity increases from 1.5 to 3.3 wt % after melt-spinning, with a dehydriding plateau pressure of 0.2 MPa at 85 °C. Above 0.1 MPa, the alloy exhibits an effective dehydriding density of 2.40 wt %. The enthalpy value of the Ti 45 Cr 52 Mo 3 alloy during de/hydrogenation, calculated using the van't Hoff equation, aligns with that of V-based BCC hydrogen storage alloys. This work also discusses the structural transformations during de/hydrogenation and explains the underlying causes of capacity attenuation after the de/hydrogenation cycle. These findings offer valuable insights into the development of high-density hydrogen storage materials, presenting a promising pathway for advancing hydrogen energy technologies.

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Thermodynamic and Kinetic Regulation for Mg‐Based Hydrogen Storage Materials: Challenges, Strategies, and Perspectives

Wang,

Li,

Wei

et al. 2024

Adv Funct Materials

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Mg‐based hydrogen storage materials have drawn considerable attention as the solution for hydrogen storage and transportation due to their high hydrogen storage density, low cost, and high safety characteristics. However, their practical applications are hindered by the high dehydrogenation temperatures, low equilibrium pressure, and sluggish hydrogenation and dehydrogenation (de/hydrogenation) rates. These functionalities are typically determined by the thermodynamic and kinetic properties of de/hydrogenation reactions. This review comprehensively discusses how the compositeization, catalysts, alloying, and nanofabrication strategies can improve the thermodynamic and kinetic performances of Mg‐based hydrogen storage materials. Since the introduction of various additives leads the samples being a multiple‐phases and elements system, prediction methods of hydrogen storage properties are simultaneously introduced. In the last part of this review, the advantages and disadvantages of each approach are discussed and a summary of the emergence of new materials and potential strategies for realizing lower‐cost preparation, lower operation temperature, and long‐cycle properties is provided.

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Understanding crystal structure roles towards developing high-performance V-free BCC hydrogen storage alloys

Cited by 16 publications

References 38 publications

Large Destabilization of (TiVNb)-Based Hydrides via (Al, Mo) Addition: Insights from Experiments and Data-Driven Models

Large Destabilization of (TiVNb)-Based Hydrides via (Al, Mo) Addition: Insights from Experiments and Data-Driven Models

Microstructure and Hydrogen Storage Behavior of TiCrMo Alloys Fabricated via Melt Spinning

Thermodynamic and Kinetic Regulation for Mg‐Based Hydrogen Storage Materials: Challenges, Strategies, and Perspectives

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