Comparative study on the dehydrogenation properties of TiCl4-doped LiAlH4 using different doping techniques
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In: International Journal of Hydrogen Energy, Vol. 37, No. 18, 01.09.2012, p. 13387-13392.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Comparative study on the dehydrogenation properties of TiCl4-doped LiAlH4 using different doping techniques
AU - Fu, J.
AU - Röntzsch, L.
AU - Schmidt, T.
AU - Tegel, M.
AU - Weißgärber, T.
AU - Kieback, B.
PY - 2012/9/1
Y1 - 2012/9/1
N2 - 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.
AB - 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.
KW - Energy research
KW - Dehydrogenation
KW - Doping methods
KW - Hydrogen storage material
KW - Lithium aluminum hydride
KW - Titanium tetrachloride
UR - http://www.scopus.com/inward/record.url?scp=84865462655&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2012.06.009
DO - 10.1016/j.ijhydene.2012.06.009
M3 - Journal articles
AN - SCOPUS:84865462655
VL - 37
SP - 13387
EP - 13392
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
SN - 0360-3199
IS - 18
ER -