Ion Mobility and Conduction in the (NH4)6LiHf2Zr2F23 Compound

The ion mobility and conduction in the (NH 4 ) 6 LiHf 2 Zr 2 F 23 compound are studied by 1 H, 19 F NMR and impedance spectroscopy methods. The types of ion motion in fluoride and ammonium sublattices are determined in the temperature interval from 150 to 450 K. As a result of the order‑disorder pha...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2021-02, Vol.57 (2), p.104-114
Main Authors: Kavun, V. Ya, Antokhina, T. F., Savchenko, N. N., Polyantsev, M. M., Podgorbunskii, A. B.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Electrochemistry
High temperature
Ion diffusion
Ion motion
Ionic mobility
Ions
NMR
Nuclear magnetic resonance
Phase transitions
Physical Chemistry
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Summary:The ion mobility and conduction in the (NH 4 ) 6 LiHf 2 Zr 2 F 23 compound are studied by 1 H, 19 F NMR and impedance spectroscopy methods. The types of ion motion in fluoride and ammonium sublattices are determined in the temperature interval from 150 to 450 K. As a result of the order‑disorder phase transition at the temperature above 400 K, the metastable high-temperature β-modification of this compound with ionic diffusion in both sublattices is formed. The conductivity in this compound at 450 K is found to be 4.5 × 10 –3 S/cm.
ISSN:1023-1935
1608-3342
DOI:10.1134/S102319352102004X