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 language | English |
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Pages (from-to) | 1455-1465 |
Number of pages | 11 |
Journal | Zeitschrift fur Physikalische Chemie |
Volume | 231 |
Issue number | 7-8 |
DOIs | |
Publication status | Published - 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