Comparative study on the dehydrogenation properties of TiCl4-doped LiAlH4 using different doping techniques

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  • J. Fu
  • L. Röntzsch
  • T. Schmidt
  • M. Tegel
  • T. Weißgärber
  • B. Kieback

Lithium aluminum hydride (LiAlH 4) is an attractive hydrogen storage material because of its comparatively high gravimetric hydrogen storage capacity. In this study, titanium tetrachloride (TiCl 4), which is liquid at room temperature, was chosen as dopant because of its high catalytic efficiency regarding the dehydrogenation of LiAlH 4. Three low-energy doping methods (additive dispersion via ball milling at low rotation speed, magnetic stirring and magnetic stirring in ethyl ether) with different TiCl 4 concentrations were compared in order to obtain optimum dehydrogenation properties of LiAlH 4. At 80 °C, TiCl 4-doped LiAlH 4 can release up to 6.5 wt.%-H 2, which opens the way to use of exhaust heat of PEM fuel cells to trigger the hydrogen release from LiAlH 4. Highlights: LiAlH 4 was doped with TiCl 4 using three different doping techniques. Optimum dehydrogenation properties were found testing various TiCl 4 concentrations. TiCl 4-doped LiAlH4 can release up to 6.5 wt.% hydrogen. Dehydrogenation kinetics of TiCl 4-doped LiAlH 4 was studied systematically at 80 °C.

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Issue number18
Pages (from-to)13387-13392
Number of pages6
Publication statusPublished - 01.09.2012

    Research areas

  • Energy research
  • Dehydrogenation, Doping methods, Hydrogen storage material, Lithium aluminum hydride, Titanium tetrachloride