Effect of heat treatment on hydrogen storage properties and thermal stability of V 68 Ti 20 Cr 12 alloy

Rong, Maohua; Wang, Feng; Wang, Jiang; Wang, Zhongmin; Zhou, Huaiying

doi:10.1016/j.pnsc.2017.08.012

Cited by 22 publications

(8 citation statements)

References 47 publications

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“…Annealing the V 68 Ti 20 Cr 12 alloy at 973 K for 72 h improved kinetic characteristics and yielded a flatter pressure− composition−temperature curve. 36 Heat treatment of the V 33 Ti 31 Cr 21 Mn 15 alloy at 1473 K for 10 h led to a flatter plateau pressure and increased desorption pressure. 37 However, further investigation is needed to optimize heat treatment conditions for V-free BCC-type alloys.…”

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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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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“…This improvement has been explained by the appearance of a secondary phase, which acts as a gateway for hydrogen to reach the main phase. Heat treatment could also enhance the first hydrogenation by changing the alloy’s microstructure [ 19 , 20 , 21 ]. Nanocrystallinity, achieved by ball milling (BM), improves the activation kinetics [ 22 , 23 , 24 ], potentially related to the increase in interfaces and the specific surface area [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of First Hydrogenation of Ti1V0.9Cr1.1 BCC Alloy by Cold Rolling and Ball Milling

2020

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In this study, we evaluated the effects of a mechanical treatment by cold rolling (CR) and ball milling (BM) on the first hydrogenation of Ti1V0.9Cr1.1 alloy. The as-cast alloy has a body-centered cubic (BCC) crystal structure, and the first hydrogenation at room temperature under 20 bars of hydrogen is practically impossible. However, the samples mechanically activated by CR or BM readily absorbed hydrogen. The sample cold-rolled for one pass exhibited faster kinetics than the sample ball-milled for five minutes, but both samples reached the same storage capacity of 3.6 wt % hydrogen. Increasing the amount of rolling or the milling time decreased the hydrogen capacity. CR is considered the best and most efficient method for the activation of Ti1V0.9Cr1.1 alloy.

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“…It is well-known that heat treatment could lead to a change in the alloys microstructure and thus modify its hydrogen storage behavior. − Many investigators have studied the effect of heat treatment on the hydrogen storage properties of metal hydrides. For example, Zhou et al observed an additional C14-type Laves phase after annealing a single-phase BCC V 35 Ti 20 Cr 45 alloy, which improved the activation and kinetics of absorption .…”

Section: Introductionmentioning

confidence: 99%

“…Rong et al reported the effects of heat treatment on crystal structure, microstructure, hydrogen storage properties, and thermal stability of V 68 Ti 20 Cr 12 alloy prepared by arc melting. No additional phases were identified, and the absorption/desorption kinetics was improved due to a homogeneous composition after heat treatment . Liu et al studied the effect of heat treatment on Ti 32 Cr 46 V 22 alloy and found that the homogenization of the microstructure reduced the slope of the plateau .…”

Section: Introductionmentioning

confidence: 99%

“…No additional phases were identified, and the absorption/desorption kinetics was improved due to a homogeneous composition after heat treatment. 5 Liu et al studied the effect of heat treatment on Ti 32 Cr 46 V 22 alloy and found that the homogenization of the microstructure reduced the slope of the plateau. 7 Reduction of oxygen concentration and homogenization of the microstructure could bring improvement of hydrogen storage behaviors.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Crystal Structure, Microstructure, and Hydrogenation Behavior of Heat-Treated Ti₅₂V₁₂Cr₃₆ Alloy

Kamble

Sharma

Huot

2019

ACS Appl. Energy Mater.

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The effect of heat treatment on the first hydrogenation of body centred cubic (BCC) Ti52V12Cr36 alloy was investigated. It was found that, after a 1 week heat treatment at 1273 K, BCC phase abundance was greatly reduced by heat treatment. The crystal structure changed from BCC to a complex multiphase pattern of BCC phase, C15-type Laves phase, and α-Ti. The network of the α-Ti phase was broader after heat treatment. The heat treatment eliminated the incubation time of the first hydrogenation and improved the kinetics, but the total hydrogen capacity was reduced by 30%.

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Effect of heat treatment on hydrogen storage properties and thermal stability of V 68 Ti 20 Cr 12 alloy

Cited by 22 publications

References 47 publications

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Enhancement of First Hydrogenation of Ti1V0.9Cr1.1 BCC Alloy by Cold Rolling and Ball Milling

Investigation of Crystal Structure, Microstructure, and Hydrogenation Behavior of Heat-Treated Ti₅₂V₁₂Cr₃₆ Alloy

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Effect of heat treatment on hydrogen storage properties and thermal stability of V 68 Ti 20 Cr 12 alloy

Cited by 22 publications

References 47 publications

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Enhancement of First Hydrogenation of Ti1V0.9Cr1.1 BCC Alloy by Cold Rolling and Ball Milling

Investigation of Crystal Structure, Microstructure, and Hydrogenation Behavior of Heat-Treated Ti52V12Cr36 Alloy

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Investigation of Crystal Structure, Microstructure, and Hydrogenation Behavior of Heat-Treated Ti₅₂V₁₂Cr₃₆ Alloy