NASICON-based solid electrolytes with exceptionally high Na-ion conductivities are considered to enable future all solid-state Na-ion battery technologies. Despite 40 years of research the interrelation between crystal structure and Na-ion conduction is still controversially discussed and far from being fully understood. In this study, microcontact impedance spectroscopy combined with single cr...

Recently, an interest in NASICON-type materials revived, as they are considered potential cathode sodium–ion batteries used large-scale energy storage. We applied a facile technique of thermal nanocrystallization glassy analogs these compounds to enhance their electrical parameters. Six nanomaterials the Na3M2(PO4)2F3 (M = V, Ti, Fe) system were studied. Samples with nominal compositions Na3V2(...

Vanadium multi redox reactions of V4+/3+ and V5+/4+ can contribute to significant capacity gain in positive electrodes for Na-Ion batteries, but the activation couple is often accompanied by asymmetric irreversible electrochemical that are very important understand developing high materials while maintaining structural stability. Here, Na+ extraction/insertion process Fe/V-mixed NASICON Na4FeV(...

A new approach was developed to prepare NaZr2(PO4)3 (NZP) powders at low temperature of 330?C. The effect different molar ratios ZrO(NO3)2 ? xH2O NaH2PO4 2H2O on the synthesis NZP systematically investigated by XRD, FE-SEM, TEM, EDS and Raman spectroscopy. mineralizer NaNO3 formed in situ due mechanochemical reaction between raw materials during grinding process. When optimal ratio Zr:P = 2:6 u...