Reversible hydrogen storage in NaF-Al composites

N. Eigen, U. Boesenberg, J. Bellosta von Colbe, T. R. Jensen, Yngve Cerenius, M. Dornheim, T. Klassen, R. Bormann

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40 Citations (SciVal)

Abstract

This work demonstrates that hydrogen can be reversibly stored in a composite of NaF and Al. NaF and Al reacts to a mixture of Na3AlF6 and NaAlH4 via hydridofluoride phases of the form Na3AlH6-xFx. The analysis of thermodynamics based on literature standard enthalpies of formation yields the technically favourable enthalpy of reaction of roughly 35 kJ/mol H-2 for a theoretical gravimetric hydrogen storage capacity of 3.3 wt%. Reaction mechanisms are discussed with respect to substitution of hydrogen by fluorine in complex hydrides. (C) 2008 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)76-80
JournalJournal of Alloys and Compounds
Volume477
Issue number1-2
DOIs
Publication statusPublished - 2009

Subject classification (UKÄ)

  • Natural Sciences
  • Physical Sciences

Keywords

  • Hydrogen storage materials
  • Milling
  • X-ray diffraction
  • diffraction
  • Neutron
  • Calorimetry

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