Effect of V content on hydrogen storage properties and cyclic durability of V–Ti–Cr–Fe alloys

Yang, Chao; Wang, Qian; Wang, Mingxing; Wang, Yao; Du, Rui; Dai, Jichuan; Yan, Yigang; Chen, Yungui; Wu, Chaoling

doi:10.1016/j.ijhydene.2023.03.307

Cited by 12 publications

(6 citation statements)

References 34 publications

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“…Regarding capacity decay, there are various reasons and explanations, among which the widely accepted view by researchers is that the reduction in particle size leads to cycle degradation, and the relative value of particle size reduction is taken as a scalar for cycle degradation . This study further processed the scanned samples.…”

Section: Resultsmentioning

confidence: 99%

Influence of Ti-Rich Secondary Phase on the Hydrogen Storage Performance of V-Based Hydrogen Storage Alloys

Huang,

Yao,

Cui

et al. 2024

Energy Fuels

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Section: Resultsmentioning

confidence: 99%

Influence of Ti-Rich Secondary Phase on the Hydrogen Storage Performance of V-Based Hydrogen Storage Alloys

Huang,

Yao,

Cui

et al. 2024

Energy Fuels

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“…Furthermore, the amount and rate of hydrogen desorption increase significantly with the increase of reaction temperature, from 0.20 wt % at 25 °C to 1.65 wt % at 85 °C (Figure S4). The lower hydrogen desorption capacity is due to the fact that the BCC-phase alloy usually has about 1.30 wt % residual hydrogen, which requires hydrogen desorption under high-temperature conditions. , Moreover, during the hydrogen desorption process of the alloy, the initial hydrogen desorption pressure is only about 6 MPa, and the dehydriding equilibrium pressure (∼0.2 MPa) is significantly higher than the atmospheric pressure, making the passing result of the lower hydrogen desorption density.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The low-Mo melt-spin alloy undergoes slightly capacity decay after successive hydrogen de/absorption cycles, with capacity retention dropping to 91% during the initial 10 cycles. During cycling, hydrogen absorption expansion and desorption contraction lead to considerable lattice strain, lattice distortion, vacancies, and defects in the BCC-type alloy, leading to a decrease in the cyclic stability of the BCC-type alloy. , XRD analysis of the phase after hydrogen absorption indicates that the alloy changes into an FCC structure with a larger volume as well as VH 2 , but it can return to the BCC phase after complete dehydrogenation (Figure b).…”

Section: Results and Discussionmentioning

confidence: 99%

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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“…Introducing Mn decreases the hysteresis factor but lowers the plateau pressure . Modification with Cu and Ni enhances activation performance but decreases storage capacity. , In contrast, V substitution in TiCr-based alloys improves storage performance, achieving a higher effective dehydriding capacity of up to 2.4 wt % . However, the high cost of V limits the application of TiCrV hydrogen storage alloys.…”

Section: Introductionmentioning

confidence: 99%

“…29,30 In contrast, V substitution in TiCr-based alloys improves storage performance, achieving a higher effective dehydriding capacity of up to 2.4 wt %. 31 However, the high cost of V limits the application of TiCrV hydrogen storage alloys. Mo is commonly used as a dopant in TiMn 2 , LaMgNi, and TiCrV alloys to enhance their hydrogen storage performances.…”

Section: Introductionmentioning

confidence: 99%

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Hu,

Tang,

Xiao

et al. 2023

ACS Appl. Energy Mater.

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V-free body-centered cubic (BCC) structured hydrogen storage alloys have gained significant attention for their low cost and high theoretical hydrogen storage capacity (3.8 wt %). However, before practical application, critical challenges, such as low dehydriding capacity, activation difficulty, and poor cyclic stability, need to be solved. In this work, an easily activated and high-performance V-free BCC-type alloy (Ti40Cr50Mo10Ce1) was successfully synthesized by heat treatment and Ce doping. The heat treatment significantly increased its dehydriding capacity to 2.5 wt %, attributed to a reduced slope factor (0.76–0.17), making it comparable to V-based BCC-type alloys. And the V-free BCC-type alloy, after Ce doping, enabled room-temperature hydrogen absorption, eliminating the need for high-temperature activation. Ce doping did not significantly affect the activation energy, enthalpy change, or hysteresis factor of the alloy during de/hydrogenation. Additionally, the V-free BCC-type alloy, after heat treatment and Ce doping, exhibited excellent cyclic stability, with a capacity retention rate of 90% after 100 cycles. This study provides valuable guidance for designing innovative and cost-effective hydrogen storage alloys.

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Effect of V content on hydrogen storage properties and cyclic durability of V–Ti–Cr–Fe alloys

Cited by 12 publications

References 34 publications

Influence of Ti-Rich Secondary Phase on the Hydrogen Storage Performance of V-Based Hydrogen Storage Alloys

Influence of Ti-Rich Secondary Phase on the Hydrogen Storage Performance of V-Based Hydrogen Storage Alloys

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

Development of V-Free BCC Structured Alloys for Hydrogen Storage

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