Hydrogen storage in Mo substituted low-V alloys treated by melt-spin process

Hu, Huazhou; Xiao, Houqun; Li, Jie; Ma, Chuanming; Yi, Luocai; Chen, Qingjun

doi:10.1016/j.cej.2022.140970

Cited by 17 publications

(3 citation statements)

References 50 publications

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“…However, the primary phase of the alloy after the melt-spin process transforms to the BCC phase (Figure b). This can be explained by the fact that the Ti metal at a high temperature is β-Ti (BCC phase), which transforms into α-Ti (HCP phase) following conventional cooling. , Interestingly, it was observed that β-Ti in low-Mo melt-spin alloys could remain as β-Ti, thereby increasing the theoretical hydrogen storage sites of the BCC structure. Moreover, by increasing the Ti/Cr ratio (>43/54), the low-Mo melt-spin alloy also exhibits three distinct characteristic peaks, and the main peaks in (110) gradually shift to a smaller angle due to the larger atomic volume of A -side Ti.…”

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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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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“…In comparison to the reported BCC-type hydrogen storage alloys, ,,− this work analyzed the de/absorption properties of the V-free BCC hydrogen storage alloy, as depicted in Figure e and detailed in Table S2. The hydrogen desorption capacity hinges on several key factors: hydrogen absorption capacity, plateau pressure, residual hydrogen, and plateau slope.…”

Section: Resultsmentioning

confidence: 99%

“…Alternatively, chemical storage like metal hydrides, , nanomaterials, , graphene materials, , and organic compounds , are being developed. Among them, promising room-temperature hydrogen storage alloys such as LaNi 5 , TiMn 2 , , TiFe, LaMgNi, − and body-centered cubic (BCC)-type alloys − have emerged for both stationary and mobile applications. These materials overcome the limitations of compressed gas or liquid hydrogen, offering advantages such as safety, low compression energy consumption, high volume storage density, and ease of operation.…”

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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Development of Ti–V–Cr–Mn–Mo–Ce high-entropy alloys for high-density hydrogen storage in water bath environments

Hu,

Xiao,

et al. 2024

Rare Met.

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Hydrogen storage in Mo substituted low-V alloys treated by melt-spin process

Cited by 17 publications

References 50 publications

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

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

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Development of Ti–V–Cr–Mn–Mo–Ce high-entropy alloys for high-density hydrogen storage in water bath environments

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