Polyethylene oxide (PEO) – Liquid crystal (E8) composite electrolyte membranes: Microstructural, electrical conductivity and dielectric studies

Koduru, Hari Krishna; Marinov, Yordan G.; Hadjichristov, Georgi B.; Петров, А. Г.; Godbert, Nicolas; Scaramuzza, Nicola

doi:10.1016/j.jnoncrysol.2018.07.006

Cited by 9 publications

(32 citation statements)

References 41 publications

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“…). R B of the PEO films is at least two orders of magnitude higher . Such a large R B reduces the voltage drop on the charge‐transfer resistance that determines redox reactions.…”

Section: Resultssupporting

confidence: 77%

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

Hadjichristov

Ivanov

Marinov

et al. 2019

Physica Status Solidi (a)

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Ion‐conductive solid polymer electrolytes composed from blends of poly(ethylene oxide) (PEO) and poly(vinylpyrrolidone) (PVP), as complexed with the ionic compound sodium periodate (NaIO4), are inspected for the presence of electric charge trapping (CT) and ionic space charge polarization (SCP) under static electric field. Thin films (110 μm‐thick) of these materials are produced at a ratio of the polymers PEO:PVP = 70:30 wt%, the concentration of NaIO4 is 5, 7.5, or 10 wt%. The electrical current at room temperature, as well as the charging/discharging in the films are studied as depending on applied voltage and time. At a detectable level, no SCP and CT processes in PEO‐PVP‐NaIO4 are evidenced, in contrast to identical experiments by PEO film under the same experimental conditions. The largely reduced SCP and CT are of importance for electrochemical applications of the considered ion‐conducting PEO‐PVP‐NaIO4 ion‐polymer coupled system.

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“…). R B of the PEO films is at least two orders of magnitude higher . Such a large R B reduces the voltage drop on the charge‐transfer resistance that determines redox reactions.…”

Section: Resultssupporting

confidence: 77%

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

Hadjichristov

Ivanov

Marinov

et al. 2019

Physica Status Solidi (a)

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“…Details regarding the materials, preparation of samples, and experimental procedures using complex impedance spectroscopy are given elsewhere [36,38] but are reported briefly in this section. Polymer/LC composites were produced from PEO and LC E8 (from Merk) (Figure S1a, Supplementary Materials) via their mixing at a ratio PEO:E8 = 70:30 by weight (wt.%).…”

Section: Methodsmentioning

confidence: 99%

“…Polymer/LC composites were produced from PEO and LC E8 (from Merk) (Figure S1a, Supplementary Materials) via their mixing at a ratio PEO:E8 = 70:30 by weight (wt.%). This ratio was found to be optimal for both the ion conductivity and dielectric properties of these composites [36]. To produce PEO/E8/NaIO 4 ion-polymer complexes, the salt sodium metaperiodate (NaIO 4 ) was added at a concentration of 10 wt.% to the PEO/E8 composite; the compositional ratio was PEO:E8:NaIO 4 = 63:27:10 wt.%.…”

Section: Methodsmentioning

confidence: 99%

“…In particular, novel electrolyte materials with microscopic porosity are attractive for fundamental research and industrial applications [35]. Previously, flexible polymer/LC composites from PEO and the LC mixture with the commercial name E8 were synthesized, and thin films of PEO/E8LC were investigated [36]. The well-known room-temperature nematic E8 is a eutectic mixture of LC cyanobiphenyl derivatives and cyanoterphenyl LCs.…”

Section: Introductionmentioning

confidence: 99%

“…PEO/E8 composites have great potential as a platform for producing electrolytes and other functional materials for sensorics and organic electronics applications. Compared to pure PEO, these composites were found to have considerably enhanced electrical conductivity and dielectric permittivity, which can be tailored by their phase-separated morphology [36]. Further, PEO/E8/NaIO 4 Na + ion-conducting polymer-LC electrolytes were synthesized and examined [38]-they demonstrated excellent ion electrolytic and dielectric properties [38,39], and hence, are attractive for diverse applications.…”

Section: Introductionmentioning

confidence: 99%

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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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Selection of best composition of Na+ ion conducting PEO-PEI blend solid polymer electrolyte based on structural, electrical, and dielectric spectroscopic analysis

Pritam

Arya

Sharma

2019

Ionics

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Polyethylene oxide (PEO) – Liquid crystal (E8) composite electrolyte membranes: Microstructural, electrical conductivity and dielectric studies

Cited by 9 publications

References 41 publications

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

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

Selection of best composition of Na+ ion conducting PEO-PEI blend solid polymer electrolyte based on structural, electrical, and dielectric spectroscopic analysis

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Polyethylene oxide (PEO) – Liquid crystal (E8) composite electrolyte membranes: Microstructural, electrical conductivity and dielectric studies

Cited by 9 publications

References 41 publications

PEO‐PVP‐NaIO4 Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

PEO‐PVP‐NaIO4 Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

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

Selection of best composition of Na+ ion conducting PEO-PEI blend solid polymer electrolyte based on structural, electrical, and dielectric spectroscopic analysis

Contact Info

Product

Resources

About

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping

PEO‐PVP‐NaIO₄ Ion‐Conducting Polymer Electrolyte: Inspection for Ionic Space Charge Polarization and Charge Trapping