Journal of Advanced Dielectrics, Volume. 14, Issue 1, 2350021(2024)

Dielectric spectroscopy characterization of Na+ ion-conducting polymer nanocomposite system PEO–PVP–NaIO4–TiO2

Georgi B. Hadjichristov1、*, Daniela G. Kovacheva2, Yordan G. Marinov1, Daniela B. Karashanova3, Todor E. Vlakhov1, and Nicola Scaramuzza4
Author Affiliations
  • 1Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko, Chaussee Blvd., BG-1784 Sofia, Bulgaria
  • 2Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., 11 bd., BG-1113 Sofia, Bulgaria
  • 3Institute of Optical Materials and Technologies, “Acad. Jordan Malinowski”, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., bl., 109, BG-1113 Sofia, Bulgaria
  • 4Dipartimento di Fisica, Università degli Studi della Calabria, Via P. Bucci, Cubo 33B, Rende (CS), IT-87036, Italy
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    We studied the effect of titanium dioxide (TiO2) nanoparticles (NPs) on dielectric behavior of Na+ ion-conducting salt-complexed polymer nanocomposite system formed from a binary polymer blend of poly(ethylene oxide) (PEO) and polyvinyl pyrrolidone (PVP), with the addition of both sodium metaperiodate (NaIO4) at concentration 10wt.% and TiO2 NPs of size ∼10nm, at concentrations 1, 2, 3, 4 and 5wt.%. Free standing nanocomposite PEO/PVP/NaIO4/TiO2 films (150μm) were characterized at room-temperature by analyzing their complex electrical impedance and dielectric spectra in the range 1Hz–1MHz. At the concentration of 3wt.% of TiO2 NPs, both ion conductivity and dielectric permittivity of the PEO/PVP/NaIO4/TiO2 ion-conducting dielectrics reach an enhancement by more than one order of magnitude as compared to nanoadditive-free case.

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    Georgi B. Hadjichristov, Daniela G. Kovacheva, Yordan G. Marinov, Daniela B. Karashanova, Todor E. Vlakhov, Nicola Scaramuzza. Dielectric spectroscopy characterization of Na+ ion-conducting polymer nanocomposite system PEO–PVP–NaIO4–TiO2[J]. Journal of Advanced Dielectrics, 2024, 14(1): 2350021

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    Paper Information

    Category: Research Articles

    Received: Jun. 7, 2023

    Accepted: Sep. 26, 2023

    Published Online: Mar. 25, 2024

    The Author Email: Hadjichristov Georgi B. (georgibh@issp.bas.bg)

    DOI:10.1142/S2010135X23500212

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