| Full text | |
| Author(s): |
de Lima Andreani, Gisele Ferreira
;
Martins Triques, Maria Regina
;
Kiminami, Claudio Shyinti
;
Botta, Walter Jose
;
Roche, Virginie
;
Jorge, Jr., Alberto Moreira
Total Authors: 6
|
| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 41, n. 48, p. 23092-23098, DEC 28 2016. |
| Web of Science Citations: | 5 |
| 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. (AU) | |
| FAPESP's process: | 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys |
| Grantee: | Claudio Shyinti Kiminami |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 12/13179-6 - Study of amorphous, metastable and nano-structured metallic alloys with emphasis on new technological applications |
| Grantee: | Alberto Moreira Jorge Junior |
| Support Opportunities: | Scholarships abroad - Research |
| FAPESP's process: | 14/21237-1 - Characterization of hydrogen storage properties of bulk Mg-based nanocomposites produced by equal channel angular pressing (ECAP) |
| Grantee: | Gisele Ferreira de Lima Andreani |
| Support Opportunities: | Regular Research Grants |