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Transmission Electron Microscopy Studies of 5-cycled Na Alanate with Ti Based Additive

Published online by Cambridge University Press:  15 February 2011

Carmen M. Andrei ,
John C. Walmsley ,
Randi Holmestad ,
Gianluigi A. Botton ,
Sesha S. Srinivasan ,
Craig M. Jensen  and
Bjorn C. Hauback
Carmen M. Andrei
Affiliation:
Department of Materials Science and Engineering, McMaster University, Hamilton, ON, L8S 4M1, Canada Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
John C. Walmsley
Affiliation:
SINTEF Materials and Chemistry, NO-7465 Trondheim, Norway
Randi Holmestad
Affiliation:
Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
Gianluigi A. Botton
Affiliation:
Department of Materials Science and Engineering, McMaster University, Hamilton, ON, L8S 4M1, Canada
Sesha S. Srinivasan
Affiliation:
Department of Chemistry, University of Hawaii, Honolulu, HI 96822, USA
Craig M. Jensen
Affiliation:
Department of Chemistry, University of Hawaii, Honolulu, HI 96822, USA
Bjorn C. Hauback
Affiliation:
Institute for Energy Technology, P.O. Box 40, NO-2007 Kjeller, Norway
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Abstract

Ti doped NaAlH4 hydride is proposed as a reversible hydrogen storage material. In this work, the microstructure of NaAlH4 with 2% TiCl3 additive was studied after 5 hydrogen cycles using a combination of transmission electron microscopy (TEM) techniques including energy dispersive spectroscopy (EDS) X-ray analysis. Selected area diffraction and high-resolution (HR) imaging confirmed the presence of the NaH phase in the material. Electron diffraction was dominated by Al. HRTEM showed the presence of edge dislocations, which might influence the hydrogen diffusivity process in these materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 884: Symposium GG – Materials and Technology for Hydrogen Storage and Generation , 2005 , GG2.4
Copyright
Copyright © Materials Research Society 2005

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