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

Georgi B. Hadjichristov; Daniela G. Kovacheva; Yordan G. Marinov; Daniela B. Karashanova; Todor E. Vlakhov; Nicola Scaramuzza

doi:10.1142/S2010135X23500212

Journals >Journal of Advanced Dielectrics >Volume 14 >Issue 1 >Page 2350021 > Article

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

Dielectric spectroscopy characterization of Na

^{+}

ion-conducting polymer nanocomposite system PEO–PVP–NaIO₄–TiO₂

Georgi B. Hadjichristov^1、*, 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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DOI: 10.1142/S2010135X23500212 Cite this Article

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 Copy Citation Text

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Abstract

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 10

wt.% and TiO₂ NPs of size ∼10

nm, at concentrations 1, 2, 3, 4 and 5

wt.%. Free standing nanocomposite PEO/PVP/NaIO₄/TiO₂ films (150

μ

m) were characterized at room-temperature by analyzing their complex electrical impedance and dielectric spectra in the range 1

Hz–1

MHz. At the concentration of 3

wt.% 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.

Keywords

Dielectric properties KWW model nanocomposites sodium-ion-polymer electrolyte systems titanium dioxide (TiO₂) nanoparticles

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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