Preparation, characterization and impedance spectroscopic studies of Na<sup>+</sup> ion conducting PEO + PVDF-blended polymer electrolytes

Ganta, Kiran Kumar; Jeedi, Venkata Ramana; Kumar, K. Shiva; Narsaiah, E. Laxmi

doi:10.1080/1023666x.2020.1860396

Cited by 30 publications

(8 citation statements)

References 46 publications

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“…The movement of charge carriers receives a gain with increasing temperature. This results in lower relaxation time, and as a result, the peak value of 𝑀" shifts towards higher frequencies [57,58]. This type of change recommends that relaxation is thermally activated and charge carrier hopping takes place.…”

Section: Electric Modulus Studiesmentioning

confidence: 99%

Effect of TiO2 Nano-Filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

Ganta¹,

Jeedi²,

Katrapally

et al. 2021

J Inorg Organomet Polym

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Nanocomposite Polymer Electrolyte (NCPE) films based on a blend of two polymers poly (ethylene oxide) (PEO) and poly (vinylidene fluoride) (PVDF) complexed with sodium perchlorate (NaClO4) salt and Nano-filler Titanium dioxide (TiO2) (i.e., (80wt%PEO/20wt%PVDF) + 7.5wt%NaClO4+ xwt%TiO2 where x = 3, 6, 9, 12, 15, and 18) were prepared and characterized as potential candidates for battery applications.Electrochemical Impedance Spectroscopy (EIS) has been employed between the frequencies 10 Hz and 4 MHz to investigate electrical, dielectric and electric modulus properties of the prepared NCPE films. Effect of TiO2 Nano-filler concentration on the structural, ionic conductivity, and dielectric relaxation has been studied. The AC conductivity of the NCPE films at high frequencies obeys Jonscher's power law. The values of DC ionic conductivity calculated by fitting the AC conductivity spectra to the best fit of Joncher's power law are consistent with the values of DC ionic conductivity calculated from the bulk resistance (Rb) of the NCPE films. The ionic conductivity that depends on temperature follows the Arrhenius rule between the temperatures 298 K and 328 K. The maximum ionic conductivity at ambient temperature 8.75x10 -5 S/cm was obtained for (80wt%PEO/20wt%PVDF) +7.5wt%NaClO4 +15wt%TiO2 NCPE film and it is attributed to the decrease in crystallinity. Using Wagner's polarization technique ionic transport numbers of various NCPE films were measured.

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Section: Electric Modulus Studiesmentioning

confidence: 99%

Effect of TiO2 Nano-Filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

Ganta¹,

Jeedi²,

Katrapally

et al. 2021

J Inorg Organomet Polym

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“…At ambient temperature, PEO exhibits sufficient chain flexibility, and the semi-crystalline structure of this polymer makes it suitable as a host for alkali metal ions and supports ionic conductivity [16][17][18]. PEO-based polymer electrolytes are among the most promising materials due to their good thermal properties and interfacial stability with metal electrodes [20][21][22][23][24][25][26][27][28][29][30]. The low glass transition temperature (T g ) of PEO, as well as its flexibility and other valuable properties, are well suited for engineering composite materials made from PEO and mesogens.…”

Section: Introductionmentioning

confidence: 99%

Ion-Conducting Flexible Thin Films of Composites from Poly(ethylene oxide) and Nematic Liquid Crystals E8—Characterization by Impedance and Dielectric Relaxation Spectroscopy

et al. 2021

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Complex electrical impedance and dielectric spectroscopy were applied to study the dielectric relaxations and their thermal behavior in ion-conducting composites/complexes from polymer poly(ethylene oxide) (PEO) and E8 nematic liquid crystals (LCs), at the compositional ratio PEO:E8 = 70:30 wt%. Flexible thin films of PEO/E8 with a thickness of 150 μm were inspected, as well as such films from Na+ ion-conducting electrolyte PEO/E8/NaIO4 with the same PEO:E8 compositional ratio, but additionally containing 10 wt.% from the salt sodium metaperiodate (NaIO4) as a dopant of Na+ ions. The molecular dynamics, namely the dielectric relaxation of PEO/E8 and PEO/E8/NaIO4, were characterized through analyses of complex impedance and dielectric spectra measured in the frequency range of 1 Hz–1 MHz, under variation of temperature from below to above the glass-transition temperature of these composites. The relaxation and polarization of dipole formations in PEO/E8 and PEO/E8/NaIO4 were evidenced and compared in terms of both electrical impedance and dielectric response depending on temperature. The results obtained for molecular organization, molecular relaxation dynamics, and electric polarization in the studied ion-conducting polymer/LC composites/complexes can be helpful in the optimization of their structure and performance, and are attractive for applications in flexible organic electronics, energy storage devices, and mechatronics.

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“…It can be seen from the gure that the presence of semicircle in all PPNES systems in the high-frequency region and a spike at an angle less than 90° in the low-frequency region indicates that all the systems are partially resistive and capacitive. The intercept of the extrapolate semicircle on the x-axis (real Z') gives the bulk resistance (R b ) of the CSPE systems [50]. As the SiO 2 nano ller wt% increases, the R b decreases up to 8wt%.…”

Section: Impedance Studiesmentioning

confidence: 99%

Influence of Silica nano particles on Structural, Electrical and Dielectric properties of PEO/PVdF/NaNO3/EC based Composite Solid Polymer Electrolytes

Mallaiah¹,

Jeedi²,

Ganta³

et al. 2022

Preprint

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Composite solid polymer electrolyte systems (CSPEs) have been synthesized using Polyethylene oxide (PEO), and Polyvinylidene fluoride (PVdF) blend as the host polymer matrix. Sodium nitrate (NaNO3) salt as ion dopant, ethylene carbonate (EC) as a plasticizer and silicon dioxide (SiO2) as nanofiller have been used in the preparation of CSPEs by solution casting method. CSPEs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC). The electrical, dielectric and electric modulus properties of the CSPEs were studied using impedance spectroscopy in the frequency range of 100 Hz to 10 MHz between the temperatures 298K and 343K. The ionic conductivity evaluated from impedance studies showed a maximum (2.107x10-4 S cm-1) for 8 wt% of SiO2 nanofiller. It was attributed to the increase in amorphous nature and conducting paths with the addition of SiO2. Wagner’s polarization method has been used to determine the ionic transport number.

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Preparation, characterization and impedance spectroscopic studies of Na⁺ ion conducting PEO + PVDF-blended polymer electrolytes

Cited by 30 publications

References 46 publications

Effect of TiO2 Nano-Filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

Effect of TiO2 Nano-Filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

Ion-Conducting Flexible Thin Films of Composites from Poly(ethylene oxide) and Nematic Liquid Crystals E8—Characterization by Impedance and Dielectric Relaxation Spectroscopy

Influence of Silica nano particles on Structural, Electrical and Dielectric properties of PEO/PVdF/NaNO3/EC based Composite Solid Polymer Electrolytes

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Preparation, characterization and impedance spectroscopic studies of Na+ ion conducting PEO + PVDF-blended polymer electrolytes

Cited by 30 publications

References 46 publications

Effect of TiO2 Nano-Filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

Effect of TiO2 Nano-Filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

Ion-Conducting Flexible Thin Films of Composites from Poly(ethylene oxide) and Nematic Liquid Crystals E8—Characterization by Impedance and Dielectric Relaxation Spectroscopy

Influence of Silica nano particles on Structural, Electrical and Dielectric properties of PEO/PVdF/NaNO3/EC based Composite Solid Polymer Electrolytes

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Preparation, characterization and impedance spectroscopic studies of Na⁺ ion conducting PEO + PVDF-blended polymer electrolytes