Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 421, Issue 1-2, Pages 185-189Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2005.09.081
Keywords
metal hydride; alane; hydride doping; kinetics; hydrogen storage materials; mechanical alloying; scanning electron microscopy; X-ray diffraction
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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 H-2 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 H-2 from the alane phase. It is shown that the alanate windows can be further doped with Ti to allow significant desorption of H-2 from AlH3 even at room temperature. (c) 2005 Elsevier B.V. All rights reserved.
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