NMR Studies of Lithium Diffusion in Li3(NH2)2I over Wide Range of Li+ Jump Rates

Alexander V. Skripov, Kai Volgmann, C. Vinod Chandran, Roman V. Skoryunov, Olga A. Babanova, Alexei V. Soloninin, Shin Ichi Orimo, Paul Heitjans

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1 Citation (Scopus)

Abstract

We have studied the Li diffusion in the complex hydride Li3(NH2)2I which appears to exhibit fast Li ion conduction. To get a detailed insight into the Li motion, we have applied 7Li nuclear magnetic resonance spectroscopy methods, such as spin-lattice relaxation in the laboratory and rotating frames of reference, as well as spin-alignment echo. This combined approach allows us to probe Li jump rates over the wide dynamic range (~102-109 s-1). The spin-lattice relaxation data in the range 210-410 K can be interpreted in terms of a thermally-activated Li jump process with a certain distribution of activation energies. However, the low-temperature spin-alignment echo decays at T≤200 K suggest the presence of another Li jump process with the very low effective activation energy.

Original languageEnglish
Pages (from-to)1455-1465
Number of pages11
JournalZeitschrift fur Physikalische Chemie
Volume231
Issue number7-8
DOIs
Publication statusPublished - 2017 Jul 26

Keywords

  • complex hydride
  • ion diffusion
  • nuclear magnetic resonance
  • spin-alignment echo
  • spin-lattice relaxation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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