Rehydrogenation and cycle studies of LiBH4-CaH2 composite

Jae Hag Lim, Jae Hyeok Shim, Young Su Lee, Jin Yoo Suh, Young Whan Cho, Joonho Lee

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Rehydrogenation behavior of 6LiBH4 + CaH2 composite with NbF5 has been studied between 350 and 500 °C after dehydrogenation at 450 °C. The composite exhibits the best rehydrogenation feature at 450 °C in terms of the overall rehydrogenation rate and the amount of absorbed hydrogen. It is found that about 9 wt% hydrogen is absorbed at 450 °C for 12 h. Up to 10 dehydrogenation-hydrogenation cycles have been carried out for the composite. It is demonstrated that 6LiBH4 + CaH2 with 15 wt% NbF5 maintains a reversible hydrogen storage capacity of about 6 wt% at 450 °C after a slight degradation between the 1st and 5th cycles. The addition of NbF5 seems to improve the cycle properties by retarding microstructural coarsening during cycles.

Original languageEnglish
Pages (from-to)6578-6582
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume35
Issue number13
DOIs
Publication statusPublished - 2010 Jul 1

Keywords

  • Cycle
  • Destabilization
  • Hydrogen storage
  • Lithium borohydride
  • Rehydrogenation

ASJC Scopus subject areas

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

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