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Reversible hydrogen storage in NaF-Al composites

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Author

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

Summary, in English

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.

Department/s

Publishing year

2009

Language

English

Pages

76-80

Publication/Series

Journal of Alloys and Compounds

Volume

477

Issue

1-2

Document type

Journal article

Publisher

Elsevier

Topic

  • Natural Sciences
  • Physical Sciences

Keywords

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

Status

Published

ISBN/ISSN/Other

  • ISSN: 0925-8388