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NMR Studies of Lithium Diffusion in Li3(NH2)2I over Wide Range of Li+ Jump Rates
Authors
Olga A. Babanova
C. Vinod Chandran
+6 more
Paul Heitjans
Shin-Ichi Orimo
Roman V. Skoryunov
Alexander V. Skripov
Alexei V. Soloninin
Kai Volgmann
Publication date
1 January 2017
Publisher
Berlin : Walter de Gruyter
Doi
Cite
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. © 2017 Walter de Gruyter GmbH, Berlin/Boston 2017
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Institutionelles Repositorium der Leibniz Universität Hannover
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Last time updated on 21/11/2017