Comparison of anion and cation dynamics in a carbon-substituted closo-hydroborate salt: 1H and 23Na NMR studies of solid-solution Na2(CB9H10)(CB11H12)

被引：0

作者：

Soloninin, A.V. ^{[1
]}

Skoryunov, R.V. ^{[1
]}

Babanova, O.A. ^{[1
]}

Skripov, A.V. ^{[1
]}

Dimitrievska, M. ^{[2
,3
]}

Udovic, T.J. ^{[2
]}

机构：

[1] Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg,620108, Russia

[2] NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg,MD,20899-6102, United States

[3] National Renewable Energy Laboratory, Golden,CO,80401, United States

来源：

Journal of Alloys and Compounds | 2019年 / 800卷

关键词：

The hexagonal mixed-anion solid solution Na2(CB9H10)(CB11H12) shows the highest room-temperature ionic conductivity among all known Na-ion conductors. To study the dynamical properties of this compound; we have measured the 1H and 23Na nuclear magnetic resonance (NMR) spectra and spin-lattice relaxation rates in Na2(CB9H10)(CB11H12) over the temperature range of 80–435 K. It is found that the diffusive motion of Na+ ions can be described in terms of two jump processes: the fast localized motion within the pairs of tetrahedral interstitial sites of the hexagonal close-packed lattice formed by large anions and the slower jump process via octahedral sites leading to long-range diffusion. Below 350 K; the slower Na+ jump process is characterized by the activation energy of 353(11) meV. Although Na+ mobility in Na2(CB9H10)(CB11H12) found from our NMR experiments is higher than in other ionic conductors; it appears to be an order-of-magnitude lower than that expected on the basis of the conductivity measurements. This result suggests that the complex diffusion mechanism and/or correlations between Na+ jumps should be taken into account. The measured 1H spin-lattice relaxation rates for Na2(CB9H10)(CB11H12) are consistent with a coexistence of at least two anion reorientational jump processes occurring at different frequency scales. Near room temperature; both reorientational processes are found to be faster than the Na+ jump process responsible for the long-range diffusion. © 2019 Elsevier B.V;

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页码：247 / 253

共 6 条

[1] Comparison of anion and cation dynamics in a carbon-substituted closo-hydroborate salt: 1H and 23Na NMR studies of solid-solution Na2(CB9H10)(CB11H12)
Soloninin, A., V
Skoryunov, R., V
Babanova, O. A.
Skripov, A., V
Dimitrievska, M.
Udovic, T. J.
JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 800 : 247 - 253
[2] Na+ diffusivity in carbon-substituted nido- and closo-hydroborate salts: Pulsed-field-gradient NMR studies of Na-7-CB10H13 and Na2 (CB9H10)(CB11H12)
Skripov, A., V
Majer, G.
Babanova, O. A.
Skoryunov, R., V
Soloninin, A., V
Dimitrievska, M.
Udovic, T. J.
JOURNAL OF ALLOYS AND COMPOUNDS, 2021, 850 (850)
[3] Anion and cation dynamics in a carbon-substituted cesium closo-hydroborate CsCB11H12: 1H and 133Cs NMR studies
Babanova, O. A.
Skoryunov, R. V.
Soloninin, A. V.
Skripov, A. V.
SOLID STATE IONICS, 2023, 401
[4] Anion reorientations and cation diffusion in a carbon-substituted sodium nido-borate Na-7,9-C2B9H12: 1H and 23Na NMR studies
Skripov, Alexander, V
Babanova, Olga A.
Skoryunov, Roman, V
Soloninin, Alexei, V
Udovic, Terrence J.
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 2022, 236 (6-8): : 839 - 851
[5] Anion and Cation Dynamics in Mixed-Anion Hydroborate Na3(BH4)(B12H12): 1H, 11B, and 23Na NMR Studies
Babanova, Olga A.
Sadikin, Yolanda
Skoryunov, Roman V.
Soloninin, Alexei V.
Skripov, Alexander V.
INORGANICS, 2024, 12 (10)
[6] Anion Reorientations and Cation Diffusion in LiCB11H12 and NaCB11H12: 1H, 7Li, and 23Na NMR Studies
Skripov, Alexander V.
Skoryunov, Roman V.
Soloninin, Alexei V.
Babanova, Olga A.
Tang, Wan Si
Stavila, Vitalie
Udovic, Terrence J.
JOURNAL OF PHYSICAL CHEMISTRY C, 2015, 119 (48): : 26912 - 26918

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