Characterization of hydrogen storage properties of Mg-Fe-CNT composites prepared by ball milling, hot-extrusion and severe plastic deformation

Characterization of hydrogen storage properties of Mg-Fe-CNT composites prepared by ball milling, hot-extrusion and severe plastic deformation

Author Andreani, Gisele Ferreira de Lima Autor UNIFESP Google Scholar
Martins Triques, Maria Regina Google Scholar
Kiminami, Claudio Shyinti Google Scholar
Botta, Walter Jose Google Scholar
Roche, Virginie Google Scholar
Jorge, Alberto Moreira, Jr. Google Scholar
Abstract A systematic investigation was performed on the hydrogen storage properties of mechanically prepared 2MgFe/carbon nanotube (CNT) composites. The powders were transformed into bulk form by three processing routes (hot-extrusion, cold-rolling and extrusion followed by cold-rolling). The samples were kept in air to test their resistance to oxidation. Hydrogen absorption capacity and hydriding kinetics of the composites were dependent on the quantity of added CNTs. A 5 wt% addition of CNTs is optimum to facilitate the hydrogen absorption and desorption. Single cold-rolling (CR) was found to be the best route. Compared with powder composites, samples prepared by CR presented improved kinetics, the same hydrogen capacity and a decrease in the incubation time for activation. The cold-rolled composite 2MgFe/5 wt% CNTs achieved 73% of the theoretical capacity of Mg2FeH6, and desorbs almost the same quantity. Moreover, these absorption and desorption processes occur faster than in the powders. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Keywords Complex hydrides
Mg2FeH6
Nanotubes
Composites
Hydrogen sorption properties
xmlui.dri2xhtml.METS-1.0.item-coverage Oxford
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 2014/21237-1
FAPESP: 2013/05987-8
FAPESP: 2012/13179-6
Date 2016
Published in International Journal Of Hydrogen Energy. Oxford, v. 41, n. 48, p. 23092-23098, 2016.
ISSN 0360-3199 (Sherpa/Romeo, impact factor)
Publisher Pergamon-Elsevier Science Ltd
Extent 23092-23098
Origin http://dx.doi.org/10.1016/j.ijhydene.2016.10.095
Access rights Closed access
Type Article
Web of Science ID WOS:000391077400050
URI https://repositorio.unifesp.br/handle/11600/56535

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