TiFe0.7Mn0.2X0.1 （X = V, Cr, Co, Ni, Cu）储氢合金的显微组织特征及储氢性能

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL International Journal of Hydrogen Energy Pub Date : 2025-03-27 Epub Date: 2025-03-05 DOI:10.1016/j.ijhydene.2025.02.476

Ryun-Ho Kwak, Sojin Jung, Tae-Yoon Park, Sung-Min Park, Hyung-Ki Park

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引用次数: 0

摘要

本研究研究了TiFe0.8Mn0.2合金中Fe被V、Cr、Co、Ni、Cu等过渡金属(TiFe0.7Mn0.2X0.1 （X = V, Cr, Co, Ni, Cu）取代的tife基季元合金的显微组织特征和储氢性能。TiFe0.8Mn0.2合金表现为B2和C14 Laves相的双相组织。用V、Cr和Ni取代Fe增加了Laves相的比例，而用Co和Cu取代合金则抑制了Laves相的形成。在所有合金中均有少量Ti2Fe相析出。对合金的室温活化性能进行了评价。Laves相百分比最高的TiFe0.7Mn0.2Cr0.1合金的首次氢化反应速度最快，随着Laves相百分比的降低，反应速度减慢。未形成Laves相的TiFe0.7Mn0.2Co0.1和TiFe0.7Mn0.2Cu0.1合金表现出较慢的动力学；然而，由于Ti2Fe相的形成，室温活化仍然是可以实现的。对合金的储氢性能进行了测试。TiFe0.7Mn0.2V0.1和TiFe0.7Mn0.2Co0.1合金表现出与TiFe0.8Mn0.2合金相似的吸氢和解吸行为，而其他合金表现出更陡峭的平台压力斜率。在30℃下吸氢量为10 bar， 70℃下吸氢量为2 bar的条件下，对其有效储氢量进行了评价。TiFe0.7Mn0.2V0.1合金的有效储氢能力与TiFe0.8Mn0.2合金相似，而TiFe0.7Mn0.2Co0.1合金的储氢能力有所降低。这些分析证实，在TiFe0.8Mn0.2合金中以V取代Fe增强了第一次氢化动力学，同时保持了优异的有效储氢能力。

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Microstructural feature and hydrogen storage properties of TiFe0.7Mn0.2X0.1 (X = V, Cr, Co, Ni, Cu) hydrogen storage alloy

This study investigated the microstructural features and hydrogen storage properties of TiFe-based quaternary alloys, where Fe in the TiFe₀_.₈Mn_0.2 alloy was additionally substituted with the transition metals of V, Cr, Co, Ni, and Cu (TiFe₀_.₇Mn_0.2X_0.1 (X = V, Cr, Co, Ni, Cu)). The TiFe₀_.₈Mn_0.2 alloy exhibited a dual-phase microstructure consisting of the B2 and C14 Laves phases. The substitution of Fe with V, Cr, and Ni increased the Laves phase percentage, while the formation of the Laves phase was suppressed in alloys with Co and Cu substitutions. In all the alloys, a small amount of the Ti₂Fe phase was precipitated. The room-temperature activation properties of the alloys were evaluated. The TiFe₀_.₇Mn₀_.₂Cr_0.1 alloy, with the highest Laves phase percentage, exhibited the fastest first hydrogenation kinetics, while the kinetics slowed as the Laves phase percentage decreased. The TiFe₀_.₇Mn₀_.₂Co_0.1 and TiFe₀_.₇Mn₀_.₂Cu_0.1 alloys, which did not form the Laves phase, displayed slower kinetics; however, the room-temperature activation was still achievable due to the formation of the Ti₂Fe phase. The hydrogen storage properties of the alloys were examined. The TiFe₀_.₇Mn₀_.₂V_0.1 and TiFe₀_.₇Mn₀_.₂Co_0.1 alloys exhibited similar hydrogen absorption and desorption behaviors to the TiFe₀.₈Mn_0.2 alloy, while the other alloys showed steeper plateau pressure slopes. The effective hydrogen storage capacities were evaluated under conditions of hydrogen absorption up to 10 bar at 30 °C and hydrogen desorption down to 2 bar at 70 °C. The TiFe₀_.₇Mn₀_.₂V₀_.₁ alloy exhibited a similar effective hydrogen storage capacity to the TiFe₀_.₈Mn_0.2 alloy, whereas the storage capacity of the TiFe₀_.₇Mn₀_.₂Co_0.1 alloy was reduced. These analyses confirmed that substituting Fe with V in the TiFe₀_.₈Mn_0.2 alloy enhanced first hydrogenation kinetics while maintaining excellent effective hydrogen storage capacity.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.