NMR Studies of Lithium Diffusion in Li3(NH2)2I Over Wide Range of Li+ Jump Rates
-
Alexander V. Skripov
,
Kai Volgmann
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.
Acknowledgements
This work was supported in part by the Russian Federal Agency of Scientific Organizations under Program “Spin” No. 01201463330, the Russian Foundation for Basic Research (Grant. No. 15-03-01114), and the JSPS KAKENHI Grant No. 25220911 from MEXT, Japan. A.V. Skripov is grateful to Alexander von Humboldt Foundation for the support of his research visit to Leibniz Universität Hannover. Research in Hannover has generally been supported by the German Research Foundation (DFG) in the frame of the Research Unit FOR 1277 (molife). The authors are also grateful to V.I. Voronin and V.A. Blatov for useful discussions.
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©2017 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Preface
- Mobility of Ions in Solids
- Solid-State NMR to Study Translational Li Ion Dynamics in Solids with Low-Dimensional Diffusion Pathways
- Solid-State NMR Spectroscopy Study of Cation Dynamics in Layered Na2Ti3O7 and Li2Ti3O7
- Density Functional Theory Evaluated for Structural and Electronic Properties of 1T-LixTiS2 and Lithium Ion Migration in 1T-Li0.94TiS2
- Diffusion Pathways and Activation Energies in Crystalline Lithium-Ion Conductors
- Lithium Mobility in Borate and Phosphate Glass Networks
- Effect of Particle Size and Pretreatment on the Conductivity of Glass Powder during Compaction
- On the Mechanisms of Chemical Intercalation of Lithium in Electrode Materials
- Nanostructured Ceramics: Ionic Transport and Electrochemical Activity
- Lithium Insertion into Mixed Phase Titania Nanotubes
- Slow Lithium Transport in Metal Oxides on the Nanoscale
- Local Ion Dynamics in Polycrystalline β-LiGaO2: A Solid-State NMR Study
- NMR Studies of Lithium Diffusion in Li3(NH2)2I Over Wide Range of Li+ Jump Rates
Artikel in diesem Heft
- Frontmatter
- Preface
- Mobility of Ions in Solids
- Solid-State NMR to Study Translational Li Ion Dynamics in Solids with Low-Dimensional Diffusion Pathways
- Solid-State NMR Spectroscopy Study of Cation Dynamics in Layered Na2Ti3O7 and Li2Ti3O7
- Density Functional Theory Evaluated for Structural and Electronic Properties of 1T-LixTiS2 and Lithium Ion Migration in 1T-Li0.94TiS2
- Diffusion Pathways and Activation Energies in Crystalline Lithium-Ion Conductors
- Lithium Mobility in Borate and Phosphate Glass Networks
- Effect of Particle Size and Pretreatment on the Conductivity of Glass Powder during Compaction
- On the Mechanisms of Chemical Intercalation of Lithium in Electrode Materials
- Nanostructured Ceramics: Ionic Transport and Electrochemical Activity
- Lithium Insertion into Mixed Phase Titania Nanotubes
- Slow Lithium Transport in Metal Oxides on the Nanoscale
- Local Ion Dynamics in Polycrystalline β-LiGaO2: A Solid-State NMR Study
- NMR Studies of Lithium Diffusion in Li3(NH2)2I Over Wide Range of Li+ Jump Rates
