High-pressure torsion of TiFe intermetallics for activation of hydrogen storage at room temperature with heterogeneous nanostructure

Kaveh Edalati, Junko Matsuda, Hideaki Iwaoka, Shoichi Toh, Etsuo Akiba, Zenji Horita

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

TiFe is a potential candidate for the stationary hydrogen storage systems, but it requires initial activation to absorb hydrogen. This study shows that TiFe processed by high-pressure torsion (HPT) absorbs and desorbs 1.7 wt.% hydrogen at room temperature without activation. The absorption pressure decreases from 2 MPa in the first hydrogenation cycle to 0.7 MPa in the latter cycles. The HPT-processed TiFe exhibits heterogeneous microstructures composed of nanograins, coarse-grains, amorphous-like phases and disordered phases with a high hardness of ∼1050 Hv.

Original languageEnglish
Pages (from-to)4622-4627
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number11
DOIs
Publication statusPublished - Apr 15 2013

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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