Dielectric properties and impedance spectroscopy of NASICON type Na3Zr2Si2PO12

Meena, Ravi Kumar; Dhaka, R. S.

doi:10.1016/j.ceramint.2022.08.111

Cited by 14 publications

(2 citation statements)

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“…Although Na 3 Zr 2 Si 2 PO 12 exhibits a good ionic conductivity (10 −4 S/cm) at room temperature, in recent years, efforts have been made to increase the ionic conductivity for a good electrochemical performance. Among Na-ion-conducting SSEs, the sodium superionic conductor (NASICON) with a general formula of Na 1+x Zr 2 Si x P 3−x O 12 (1.0 ≤ x ≤ 3) has attracted the most attention due to its high ionic conductivity and low thermal expansion [21,22]. The NASICON type solid electrolyte is characterized by chemical stability suitable for electrochemical applications in different working environments that involve either moist air or the presence of aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

“…This effect can be combated by the excessive and controlled dosage of Na and P in the manufacturing raw materials, and the appearance of ZrO 2 impurities along the crystal lattice can be avoided or minimized; in this way, the mobility of sodium ions can no longer be disturbed. In recent years, studies have focused on improving the ion conduction properties of NASICON, exploring the mechanism of ion conduction and the underlying strategies to form a stable interface with electrode materials [22,23].…”

Section: Introductionmentioning

confidence: 99%

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NASICON Membrane with High Ionic Conductivity Synthesized by High-Temperature Solid-State Reaction

Iordache,

Oubraham,

Petreanu

et al. 2024

Materials

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In the present work, we studied the impact of excess Na addition on the structure of the standard NASICON ion conductor along with Na ion transport mechanisms. In this sense, NASICON ceramic membranes (NZSP) were prepared by a simple chemical synthesis method, the solid state reaction (SSR), using an excess of 5% Na (Na3.15Zr2Si2PO12) and an excess of 10% Na (Na3.3Zr2Si2PO12), in order to improve the conduction properties of the ceramic membrane. The characterization of the NZSP nanoparticles was performed by measuring the particle size by dynamic light scattering (DLS), the morphology of the NASICON samples pre-sintered at 1100 °C was analyzed by the SEM method (scanning electron microscope), and X-ray diffraction (XRD) analysis was used to investigate the crystal structure of samples, while the surface area was measured using the BET technique. The electrical properties (i.e., ionic conductivity) were evaluated by impedance spectroscopic methods at room temperature (RT). Following the experiments for NASICON membranes without Na excess, with 5% Na excess, and with 10% Na excess synthesized at different pressing forces and sintering temperatures, it was found that membranes with a 10% Na excess, sintered at 1175 °C for 10 h, presented a good ionic conductivity (4.72 × 10−4 S/cm).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%