Comparison of commercial and hydriding-combustion-synthesized Mg-hydride

M. G. Chourashiya, Dong Cheol Yang, Sae Youn Kim, Choong Nyeon Park, Chan Jin Park*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

This study employed a fast, simple and cost-effective hydriding combustion synthesis (HCS) to prepare nano/submicron Mg based alloys, which are the most promising solid state hydrogen storage materials owing to their high storage capacity (7.6 wt.%) and highest volumetric density. The microstructural and absorption/desorption kinetic properties of the prepared MgH2 samples were characterized and compared with commercially available MgH2 powders. The detailed BET analysis of the HCS prepared samples showed a higher surface area than that of commercial MgH2, which resulted in better absorption/desorption kinetics. The HCS-prepared MgH2 powder absorbed 6.2 wt.% H2 with a rate of 0.31 wt.%/min, whereas it desorbed at a rate of 0.98 wt.%/min. These results highlight the superiority of the HCS method to prepare MgH2 powders over conventional ingot-metallurgy.

Original languageEnglish
Pages (from-to)42-45
Number of pages4
JournalMaterials Letters
Volume66
Issue number1
DOIs
StatePublished - 1 Jan 2012
Externally publishedYes

Keywords

  • Absorption/desorption kinetics
  • FESEM
  • Hydriding combustion
  • Hydrogen storage
  • Mg-based alloys

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