Local atomic structural investigations of precursory phenomenon of the hydrogen release from LiAlD4

Toyoto Sato, Keisuke Tomiyasu, Kazutaka Ikeda, Toshiya Otomo, Mikhail Feygenson, Jörg Neuefeind, Kazuyoshi Yamada, Shin Ichi Orimo

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Abstract

Local atomic structural investigations of LiAlD4, which is composed of Li+ and [AlD4]-, at 40-300 K were studied by total neutron scattering combined with pair distribution function (PDF) analysis for understanding of hydrogen release from LiAlD4. The results showed that the Al-D pair distribution almost unchanged, while the Li-D pair distribution clearly started to broaden and shrink above 200-250 K. The shrinking of the Li-D pair distribution might lead to the local generation of LiD, which was speculated as the precursory phenomenon for the hydrogen release from LiAlD4.

Original languageEnglish
Pages (from-to)244-247
Number of pages4
JournalJournal of Alloys and Compounds
Volume586
DOIs
StatePublished - 2014
Externally publishedYes

Funding

The neutron scattering experiment was approved by the Neutron Science Proposal Review Committee of J-PARC/MLF (Proposal No. 2011A0026) and supported by the S-type neutron research project (Proposal No. 2009S06) of IMSS, KEK. Neutron scattering experiments were conducted at the SNS, which is operated with the support from the Division of Scientific User Facilities Office of Basic Energy Sciences, U.S. Department of Energy, under contract DE-AC05-00OR22725 with UT Battelle, LLC. A part of this work was financially supported by the Advanced Fundamental Research on Hydrogen Storage Materials from the New Energy and Industrial Technology Development Organization (NEDO) , the Exploratory Research Program for Young Researchers from Tohoku University and JSPS KAKENHI Grant Numbers 22244039 , 23686101 , 24241034 and 25220911 from the MEXT, Japan.

Keywords

  • Complex hydride
  • Hydrogen storage
  • Local atomic structure
  • Pair distribution function
  • Total neutron scattering

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