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Hydrogen absorption and desorption properties of a novel ScNiAl alloy

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Author

  • Adam Sobkowiak
  • Jonas Angstrom
  • Thomas Kollin Nielsen
  • Yngve Cerenius
  • Torben R. Jensen
  • Martin Sahlberg

Summary, in English

A new hydrogen absorbing material has been discovered, ScNiAl, which can store 1.5 wt.% hydrogen reversibly. In this compound, hydrogen absorption is a two-step process; solid solution of hydrogen at temperatures below 180A degrees C and decomposition into ScH2 and NiAl at higher temperatures. Detailed analysis of the hydrogen absorption/desorption has been performed using in situ synchrotron radiation powder X-ray diffraction and thermal desorption spectroscopy. The apparent activation energy for hydrogen desorption was determined to be 182 kJ/mol and the material is stable during cycling.

Department/s

Publishing year

2011

Language

English

Pages

235-238

Publication/Series

Applied Physics A: Materials Science & Processing

Volume

104

Issue

1

Document type

Journal article

Publisher

Springer

Topic

  • Physical Sciences
  • Natural Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 1432-0630