Synergetic effect of TiO₂ nano filler additives on conductivity and dielectric properties of PEO/PVP nanocomposite electrolytes for electrochemical cell applications

Abstract

Abstract. Sodium-ion conducting PEO/PVP blend based solid polymer electrolyte films complexed with NaIO 4 salt and nano-sized TiO 2 fillers are fabricated by employing a solution casting technique for Na-ion battery applications. Measurements of X-ray diffraction (XRD) and thermogravimetric analysis (TGA) are carried out to investigate the crystallinity and thermal stability of the solid polymer electrolytes. Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) studies are performed to understand the modifications in surface morphological features and to evaluate the size and distribution of dispersed nano-sized TiO 2 fillers. The room temperature ionic conductivities of polymer electrolyte films are investigated by impedance analysis in the frequency range 1 MHz -1 Hz. The nano-sized TiO 2 (3 wt%) filled composite electrolyte of 'PEO/PVP/NaIO 4 (10 wt%)' demonstrates a maximum room temperature conductivity of 9.82 X 10 -6 S/cm. The influence of TiO 2 filler on conductivity and dielectric properties are presented in this report.

Structural, Impedance, and EDLC Characteristics of Proton Conducting Chitosan-Based Polymer Blend Electrolytes with High Electrochemical Stability

“…To strength this structure, semi-crystalline polymers are often used as host materials in polymer electrolytes [10]. Therefore, the growing need for sufficient conductivity has encouraged researchers to consider a reasonable method, which comprises polymer blending [11,12].…”

Functional dielectric materials for high-performance solid-state batteries

“…109 However, the agglomeration of nanoparticles with increasing the amount of fillers reduces the ionic conductivity and limits the movement of carriers. 111,112 Blending between polymers and their synergistic effects with Li-salts (or filler) are the most commonly used methods to increase the dielectric constant, such as PVA/PVP/Li 2 CO 3 , 113 PMMA/PEO/LiClO 4 /Montmorillonite (MMT), 114 PMMA/LiClO 4 /PEG/MMT, 115 PEO/PMMA/LiBF 4 /EC/MMT, 116 Corn starch/LiClO 4 , 117 PEO/LiClO 4 /Al 2 O 3 , 118 PEO/PVP/TiO 2 , 119 PEO/PVC/MMT, 120 PEO/PAN/LiPF 6 , 121 PEO/PMMA/SiO 2 , 122 PVA/NH 4 Cl, 123 PVP/PEO/(NH 4 ) 2 Ce(NO 3 ) 6 , 124 and PVDF/PEO. 125 This method is mainly to introduce strong polar groups into the system and adjust the concentration of Li-salts (or filler) to change the total dielectric polarization.…”

Conductivity and transport properties of starch/glycerin-MgSO4 solid polymer electrolytes

“…Solid polymer electrolytes are seen as a vital component; having a wide range of applications in electrochemical devices such as high energy density batteries, super capacitors, fuel cells, sensors, organic transistor and dye-sensitized solar cells (Dai et al, 2018;Verma and Sahu, 2017). Extensive exploration to cultivate a new solid polymer electrolyte with good electrical conductivity and environmental stability has been on the rise, specifically with regard to their ionic, dielectric and transport properties (Prajapati and Gupta, 2009;Zamri et al, 2014;Chai and Isa, 2016;Bandara and Mellander, 2011;Koduru et al, 2017;Gohel and Kanchan, 2018). Electrochemical impedance spectroscopy (EIS) technique is among the most commonly used technique for the evaluation and study of the ionic conductivity, dielectric, and transport properties of solid polymer electrolytes.…”