Conducting and dielectric properties of Na3Fe2(PO4)3 and Na2FePO4F

Abstract

In this research, the structure parameters, conducting and dielectric properties of Na3Fe2(PO4)3 and Na2FePO4F polycrystals were studied obtained by solid-phase synthesis. The phase transition temperatures, conducting and dielectric parameters of Na3Fe2(PO4)3 and Na2FePO4F polycrystals were refined. A comparative evaluation of the conductive properties of Na3Fe2(PO4)3 and Na2FePO4F polycrystals is given in this article. The prospects of using of Na3Fe2(PO4)3 and Na2FePO4F are justified as electrode materials in sodium ion batteries.

NASICON-type Na3Fe2(PO4)3 material for an excellent room temperature CO sensor

“…At higher temperature, there will be a steady state between gas adsorption and desorption, and because desorption is quite favorable at high temperatures, response will be reduced. 41,42 This concludes that the NFP sensor exhibits superior response to CO gas at room temperature (27 °C) to 50 °C and weak response at higher temperature. Thus, the NFP material can be one of the best suited sensing materials for normal room temperature (27 °C) to high temperature summer environment conditions (50–60 °C).…”

Features of Structures and Ionic Conductivity of Na3Fe2(PO4)3 Polycrystals Obtained by Solid Phase and Melt Methods

“…It should be noted that in the system of solid solutions Na 3 Fe 2(1−x) Sc 2x (PO 4 ) 3 (0 < x < 0.06), an increase in conductivity was observed [38]. The replacement of iron M-cations (r Fe = 0.54) with Sc atoms (r Sc = 0.82) in Na 3 Fe 2 (PO 4 ) 3 also leads to local tensile deformations of the crystalline framework, due to the difference in ionic radii of the substituted elements.…”

Progress on Fe‐Based Polyanionic Oxide Cathodes Materials toward Grid‐Scale Energy Storage for Sodium‐Ion Batteries

“…[70] Recently, researchers reported that the low conductivity of NASICON Na 3 Fe 2 (PO 4 ) 3 might be related to polymorphism, in which only γ-Na 3 Fe 2 (PO 4 ) 3 is a superionic conductor while α-Na 3 Fe 2 (PO 4 ) 3 is a dielectric phase. [71,72] In addition, the majority of research on NASICON Na 3 Fe 2 (PO 4 ) 3 was focused on the reversible capacity increasing by carbon decorating. Nevertheless, the impact of element doping, which might boost the application, is disregarded current.…”