Hydrogen storage in MgH2LaNi5 composites prepared by cold rolling under inert atmosphere

Márquez, Jose J.; Leiva, Daniel Rodrigo; Floriano, Ricardo; Soyama, Juliano; Silva, Wagner Barreto da; Ishikawa, Tomaz Toshimi; Kiminami, Cláudio Shyinti; Filho, Walter José Botta

doi:10.1016/j.ijhydene.2018.05.067

Cited by 26 publications

(17 citation statements)

References 29 publications

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“…Absorption was performed at only 100°C, which is considered as a low and attractive temperature for absorption. These results show excellent stability of the samples for cycling, which was undoubtedly helped by the compaction of the powders during cold rolling 69) and the clean surfaces due to the controlled atmosphere during processing.…”

Section: Processing Of Bulk Mg and Mg-based Alloys By Spdmentioning

confidence: 85%

“…68) Severe or extensive plastic deformation has been used more recently to process Mg-based composites. MgH 2 LaNi 5 mixture was processed by cold rolling under controlled atmosphere resulting in compacted composite flakes, 69) which presented faster kinetics and reduced desorption temperatures in comparison with MgH 2 . Figure 9 shows the absorption kinetics curves for the MgH 2 +1.5 mol% LaNi 5 composite during 10 cycles of hydrogen desorption/absorption.…”

Section: Processing Of Bulk Mg and Mg-based Alloys By Spdmentioning

confidence: 99%

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Hydrogen Storage in Mg and Mg-Based Alloys and Composites Processed by Severe Plastic Deformation

Leiva¹,

Jorge²,

Ishikawa³

et al. 2019

Mater. Trans.

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Mg-based hydrides have been extensively studied in the last 20 years due to its great potential as hydrogen storage materials, especially for stationary applications. Severe plastic deformation (SPD) can be used to produce Mg-based materials for hydrogen storage applications, with good activation (first hydrogenation) and H-absorption/desorption kinetics, combined with enhanced air resistance. Both advanced (e.g. highpressure torsion, equal-channel angular pressing) and more conventional (e.g. cold rolling, cold forging) techniques were investigated as means of production of bulk samples with refined microstructures and controlled textures. Depending on the processing parameters, SPD or SPD-like techniques can produce sub-microcrystalline or even nanocrystalline structures, with a fair level of dispersion of the additives and high level of the desired [0002] fibre type texture. In this review we discuss how the processing of hydrogen storage materials by SPD techniques matches the following desirable aspects: fast kinetics (many interfaces nano-grains and additives), easy activation (clean surfaces, interfaces, and adequate texture) and thermodynamic stability (alloying; synergy between phases in composites). The results suggest new and in most cases simpler and cheaper alternatives to produce hydrogen storage materials with proper hydrogen absorption and desorption kinetics and, in the case of composites, lower hydride stability.

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Section: Processing Of Bulk Mg and Mg-based Alloys By Spdmentioning

confidence: 85%

Section: Processing Of Bulk Mg and Mg-based Alloys By Spdmentioning

confidence: 99%

Hydrogen Storage in Mg and Mg-Based Alloys and Composites Processed by Severe Plastic Deformation

Leiva¹,

Jorge²,

Ishikawa³

et al. 2019

Mater. Trans.

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“…The effects of CR on magnesium and its alloys have been extensively studied [157,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227]. One reason is that magnesium has a high hydrogen storage capacity (7.6 wt%).…”

Section: Effect Of Cold Rolling On Metal Hydridesmentioning

confidence: 99%

“…Even though the utilization of cold rolling for metal hydrides is relatively new, in addition to these two examples, many other systems have been investigated [214,217,225,227,239,240,241,242,243]. However, there is still a lack of understanding the exact reason for the effectiveness of cold rolling on the hydrogenation behavior of metal hydride.…”

Section: Effect Of Cold Rolling On Metal Hydridesmentioning

confidence: 99%

Mechanochemistry of Metal Hydrides: Recent Advances

et al. 2019

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This paper is a collection of selected contributions of the 1st International Workshop on Mechanochemistry of Metal Hydrides that was held in Oslo in May 2018. In this paper, the recent developments in the use of mechanochemistry to synthesize and modify metal hydrides are reviewed. A special emphasis is made on new techniques beside the traditional way of ball milling. High energy milling, ball milling under hydrogen reactive gas, cryomilling and severe plastic deformation techniques such as High-Pressure Torsion (HPT), Surface Mechanical Attrition Treatment (SMAT) and cold rolling are discussed. The new characterization method of in-situ X-ray diffraction during milling is described.

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“…13,14) Recently, Márquez et al used cold rolling under an inert atmosphere to mix Mg and LaNi 5 powders to form composites. 15) The composites showed a nanocrystalline structure after cold rolling and the hydride phases MgH 2 , Mg 2 NiH 4 and LaH 3 were seen after cycling. The authors explained the fast kinetics by the formation of intermediate hydrides LaH 3 and Mg 2 NiH 4 .…”

Section: Magnesium-ab 5 Systemmentioning

confidence: 94%

Effect of Cold Rolling on Metal Hydrides

Huot

Tousignant

2019

Mater. Trans.

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In this paper we review the recent studies of the effect of cold rolling on selected metal hydride systems. Magnesium is the most studied element in this perspective either as pure element, alloys, allied with iron or in a composite with AB 5 alloy alloys. Other systems will also be discussed such as titanium, AB 5 and AB 2 systems. After a critical review of these systems, we will discuss in detail the effect of cold rolling on Mg 2 Ni alloy and shows that cold rolling is efficient to improve the first hydrogenation but has basically no impact of subsequent hydrogenation kinetics.

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Hydrogen storage in MgH2LaNi5 composites prepared by cold rolling under inert atmosphere

Cited by 26 publications

References 29 publications

Hydrogen Storage in Mg and Mg-Based Alloys and Composites Processed by Severe Plastic Deformation

Hydrogen Storage in Mg and Mg-Based Alloys and Composites Processed by Severe Plastic Deformation

Mechanochemistry of Metal Hydrides: Recent Advances

Effect of Cold Rolling on Metal Hydrides

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