Effect of Cold Rolling on the Hydrogen Desorption Behavior of Binary Metal Hydride Powders under Microwave Irradiation

Dupim, Ivaldete da Silva; Santos, Sydney Ferreira; Huot, Jacques

doi:10.3390/met5042021

Cited by 7 publications

(5 citation statements)

References 41 publications

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“…Depending on the dielectric properties of materials, the interaction of charged particles or polar molecules with the electric field part of the electromagnetic produces radiation heat . Several investigations have been carried out on the possibility of using such effects to drive the hydrogen desorption process and the effectiveness of microwave radiation varies as function of the hydrides. For example, no temperature increase was observed for simple ionic hydrides (LiH, NaH, MgH 2 and CaH 2 ) while metallic hydrides such as TiH 2 is heated to 327 °C upon a 3.5 min microwave irradiation .…”

Section: Non‐thermal and Non‐straightforward Thermally Driven Methodsmentioning

confidence: 99%

Unconventional Approaches to Hydrogen Sorption Reactions: Non‐Thermal and Non‐Straightforward Thermally Driven Methods

et al. 2019

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In the last decades, a broad family of hydrides have attracted attention as prospective hydrogen storage materials of very high gravimetric and volumetric capacity, fast H 2 -sorption kinetics, environmental friendliness and economical affordability. However, constraints due to their high activation energies of the different H 2 -sorption steps and the Gibbs energy of their reaction with H 2 has led to the need of high thermal energy to drive H 2 uptake and release. High heat leads to significant degradation effects (recrystallization, phase segregation, nanoparticles agglomeration…) of the hydrides. In this context, this short review aims to summarize alternative non-thermal methods and non-straightforward thermally driven methods to overcome the previous constraints. The phenomenology lying behind these methods, i. e. tribological activation, sonication, and electromagnetic radiation, and the effect of these processes on hydrogen sorption properties of hydrides are described. These non-usual approaches could boost the capability of the next generation of solid-hydride materials for hydrogen conversion in energy sector, in mobile devices and as hydrogen reservoirs.[a] J.

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Section: Non‐thermal and Non‐straightforward Thermally Driven Methodsmentioning

confidence: 99%

Unconventional Approaches to Hydrogen Sorption Reactions: Non‐Thermal and Non‐Straightforward Thermally Driven Methods

et al. 2019

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“…Dupim et al have shown that for MgH 2 , TiH 2 , and ZrH 2 , cold rolling enhance the microwave-assisted desorption. 69)…”

Section: Pure Magnesium and Commercial Mg Alloysmentioning

confidence: 99%

Effect of Cold Rolling on Magnesium-Based Metal Hydrides

Kudriashova

Huot

2023

Mater. Trans.

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“…To improve the properties of magnesium hydride and other metal hydrides, mechanical methods are used [10][11][12][13]. Ball milling is one of the most common methods for removing the oxide layer from the magnesium particle surface leading to particle size reduction.…”

Section: Of 14mentioning

confidence: 99%

The Effect of High-Energy Ball Milling Conditions on Microstructure and Hydrogen Desorption Properties of Magnesium Hydride and Single-Walled Carbon Nanotubes

Kudiiarov

Elman

Kurdyumov

2021

Metals

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Magnesium hydride is considered to be one of the most promising hydrogen storage materials, although it nevertheless has some problems, such as the high value of the activation energy of hydrogen desorption. To solve this problem, some scientists have proposed adding nanocarbon materials, in particular carbon nanotubes, to magnesium hydride. Currently, a detailed understanding of the mechanisms of obtaining composites based on magnesium hydride and carbon nanotubes is lacking, as is our understanding of the effect of nanocarbon additives on the activation energy and temperature of hydrogen desorption depending on the parameters of the composite synthesis. In addition, the data obtained at various values of milling parameters are very different, and in some works the effect of carbon nanomaterials on the hydrogen properties of magnesium hydride was not confirmed at all. Thus, it is important to determine the effect of nanocarbon additives on the properties of hydrogen storage of magnesium hydride under various milling parameters. This work is devoted to the study of the effect of nanocarbon additives on magnesium hydride and the determination of the dependences of the hydrogen desorption temperature and activation energy on the synthesis parameters. Composite powders containing MgH2 with 5 wt.% single-walled carbon nanotubes (SWCNT) were prepared using a planetary ball mill. The milling was carried out at various milling speeds, namely 300, 660, and 900 rpm. Results suggested that the structure of the nanotubes is preserved with prolonged grinding of magnesium hydride and SWCNT in a ball mill for 180 min at a relatively low grinding speed of 300 rpm. The composite obtained with these parameters has the lowest temperature of hydrogen desorption and an activation energy of H2 desorption of 162 ± 1 kJ/mol H2, which is 15% lower than that of the magnesium hydride MgH2 (189 ± 1 kJ/mol H2).

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Effect of Cold Rolling on the Hydrogen Desorption Behavior of Binary Metal Hydride Powders under Microwave Irradiation

Cited by 7 publications

References 41 publications

Unconventional Approaches to Hydrogen Sorption Reactions: Non‐Thermal and Non‐Straightforward Thermally Driven Methods

Unconventional Approaches to Hydrogen Sorption Reactions: Non‐Thermal and Non‐Straightforward Thermally Driven Methods

Effect of Cold Rolling on Magnesium-Based Metal Hydrides

The Effect of High-Energy Ball Milling Conditions on Microstructure and Hydrogen Desorption Properties of Magnesium Hydride and Single-Walled Carbon Nanotubes

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