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Synthesis and Transport Properties of Triple Molybdate Na1-xMg1-xIn1+x(MoO4)3 with the NASICON-Type Structure
Dmitry Fedorov1,2, Irina Kotova3, Alexander Tyutyunnik2
1M.N. Mikheev Institute of Metal Physics, UB RAS, 620137 Ekaterinburg, Russia.
Abstract:
The search for sodium-containing materials with high ionic conductivity is crucial for the development of sodium-ion battery technologies. This article presents the results of comprehensive experimental and theoretical studies of the novel triple molybdate Na1-xMg1-xIn1+x(MoO4)3 (x = 0.1-0.5) obtained by solid-state synthesis. The crystal structure was examined by X-ray diffraction and assigned to the NASICON type (space group Rc, Z = 6). The results of impedance and 23Na NMR spectroscopy, as well as BVSE and DFT calculations, revealed the occurrence of rather fast translational diffusion of sodium atoms with an activation energy, Ea ≈ 0.7 eV.
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