Novel electrolytic systems composed from polymer polyethylene oxide (PEO), the mesogenic liquid crystal (LC) mixture E8 and the salt sodium metaperiodate (NaIO4) as ions dopant, were studied by electrical measurements upon temperature variation. Free-standing films (thickness from 0.1 to 0.25 mm) of flexible composite electrolytes were produced by solution casting technique from PEO and E8LC at a ratio PEO:E8LC 70:30 wt%, with addition of NaIO4 at weight percentage ranging from 2 to 10 wt%. Being of importance for electrochemical and other applications, the complex electrical impedance spectra and current-voltage characteristics of sodium ion-conductive PEO/E8LC/NaIO4 electrolyte films were analyzed and interrelated to their structural properties and thermal behaviors. Compared to another advanced Na+-conducting solid polymerblend electrolyte, namely NaIO4-complexed PEO/PVP/NaIO4 at equal concentration of the salt, the studied PEO/E8LC/NaIO4 electrolytes exhibit similar value of ionic conductivity. Such flexible composites incorporating LC soft matter are ionic conductors that can combine the advantages of solid polymer electrolytes with the unique properties of the LC soft matter included in plastic materials. They are promising polymer-LC combination and are attractive for sensorics, mechatronics and soft electronics applications.
PEO/E8 Polymer-Liquid Crystal Flexible Complex Blend Electrolyte System for Na Ions
Hari Krishna Koduru;Nicola Scaramuzza
2019-01-01
Abstract
Novel electrolytic systems composed from polymer polyethylene oxide (PEO), the mesogenic liquid crystal (LC) mixture E8 and the salt sodium metaperiodate (NaIO4) as ions dopant, were studied by electrical measurements upon temperature variation. Free-standing films (thickness from 0.1 to 0.25 mm) of flexible composite electrolytes were produced by solution casting technique from PEO and E8LC at a ratio PEO:E8LC 70:30 wt%, with addition of NaIO4 at weight percentage ranging from 2 to 10 wt%. Being of importance for electrochemical and other applications, the complex electrical impedance spectra and current-voltage characteristics of sodium ion-conductive PEO/E8LC/NaIO4 electrolyte films were analyzed and interrelated to their structural properties and thermal behaviors. Compared to another advanced Na+-conducting solid polymerblend electrolyte, namely NaIO4-complexed PEO/PVP/NaIO4 at equal concentration of the salt, the studied PEO/E8LC/NaIO4 electrolytes exhibit similar value of ionic conductivity. Such flexible composites incorporating LC soft matter are ionic conductors that can combine the advantages of solid polymer electrolytes with the unique properties of the LC soft matter included in plastic materials. They are promising polymer-LC combination and are attractive for sensorics, mechatronics and soft electronics applications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
