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Molecular and Ionic Dynamics in NaxLi6–xC60
- Source :
- The Journal of Physical Chemistry C
- Publication Year :
- 2017
- Publisher :
- American Chemical Society (ACS), 2017.
-
Abstract
- We report on the C-60, Na, and Li dynamics in NaxLi6xC60 fullerides (x = 0, 1, 5, and 6) in the temperature range 80-550 K by using C-13, Na-23, and Li-7 solid state NMR. The results show that the C-60 reorientation dynamics is hindered at room temperature for the Li-enriched fullerides, but it is active for the Na rich ones with a rate of the order of few kilohertz. Na-23 and Li-7 NMR measurements show the presence of two dominant thermally activated dynamics that can be associated with Li/Na ionic motions within the octahedral sites (intrasite motion) and between the octahedral and tetrahedral sites (intersite motion). The substitution of one Na or one Li ion in the end members Li6C60 and Na6C60, respectively, yields to an increase of the hopping rate of the intersite motion, which is necessary for the ionic diffusion in possible fulleride-based ionic conductors.
- Subjects :
- REVERSIBLE HYDROGEN STORAGE
Chemistry
Dynamics (mechanics)
Ionic bonding
02 engineering and technology
Atmospheric temperature range
010402 general chemistry
021001 nanoscience & nanotechnology
LITHIUM INTERCALATED FULLERIDES
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Ion
General Energy
Solid-state nuclear magnetic resonance
Octahedron
Chemical physics
Computational chemistry
Ionic diffusion
NUCLEAR-MAGNETIC-RESONANCE
Physical and Theoretical Chemistry
0210 nano-technology
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 121
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi.dedup.....5c74f905d8425736f311bdf6a8e52cd3
- Full Text :
- https://doi.org/10.1021/acs.jpcc.7b00887