Alkali metal hydride doping of α-AlH3 for enhanced H2 desorption kinetics

Alkali metal hydride doping of α-AlH3 for enhanced H2 desorption kinetics

AlH3 can meet the gravimetric and volumetric targets for onboard vehicular hydrogen storage, but must be regenerated offboard. Doping of AlH3 with small levels of the alkali metal hydrides LiH, NaH and KH results in accelerated H2 desorption rates at low temperature. The phenomenology of the doping...

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Veröffentlicht in:Journal of alloys and compounds 2006-09, Vol.421 (1-2), p.185-189
Hauptverfasser: SANDROCK, Gary, REILLY, James, GRAETZ, Jason, ZHOU, Wei-Min, JOHNSON, John, WEGRZYN, James
Format: Artikel
Sprache:eng
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Alternative fuels. Production and utilization
Applied sciences
Chemical and electrochemical properties
Energy
Exact sciences and technology
Fuels
Hydrogen
Metals. Metallurgy
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container_end_page 189
container_issue 1-2
container_start_page 185
container_title Journal of alloys and compounds
container_volume 421
creator SANDROCK, Gary
REILLY, James
GRAETZ, Jason
ZHOU, Wei-Min
JOHNSON, John
WEGRZYN, James
description AlH3 can meet the gravimetric and volumetric targets for onboard vehicular hydrogen storage, but must be regenerated offboard. Doping of AlH3 with small levels of the alkali metal hydrides LiH, NaH and KH results in accelerated H2 desorption rates at low temperature. The phenomenology of the doping process is discussed in terms of the formation of alanate windows for the transport of H2 from the alane phase. It is shown that the alanate windows can be further doped with Ti to allow significant desorption of H2 from AlH3 even at room temperature.
doi_str_mv 10.1016/j.jallcom.2005.09.081
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source ScienceDirect Journals (5 years ago - present)
subjects Alternative fuels. Production and utilization
Applied sciences
Chemical and electrochemical properties
Energy
Exact sciences and technology
Fuels
Hydrogen
Metals. Metallurgy
title Alkali metal hydride doping of α-AlH3 for enhanced H2 desorption kinetics
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