Impact of polymer blending on ionic conductivity and dielectric polarization of TiO2 incorporated SPEEK/PVDF electrolytes

YILMAZOĞLU, Mesut; OKKAY, Hikmet; Abacı, Ufuk

doi:10.1016/j.colsurfa.2025.136394

Impact of polymer blending on ionic conductivity and dielectric polarization of TiO2 incorporated SPEEK/PVDF electrolytes

Yazarlar (3)

Doç. Dr. Mesut YILMAZOĞLU Yalova Üniversitesi, Türkiye

Doç. Dr. Hikmet OKKAY Yalova Üniversitesi, Türkiye

Ufuk Abacı Kocaeli Üniversitesi, Türkiye

Makale Türü	Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı	Colloids and Surfaces A Physicochemical and Engineering Aspects (Q2)
Dergi ISSN	0927-7757 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler	SCI-Expanded
Makale Dili	İngilizce	Basım Tarihi	04-2025
Cilt / Sayı / Sayfa	711 / 1 / –	DOI	10.1016/j.colsurfa.2025.136394
Makale Linki	https://doi.org/10.1016/j.colsurfa.2025.136394

Özet

In the present study, the effect of varying polyvinylidene fluoride (PVDF) content and blend ratios on the ionic conductivity and dielectric properties of titanium dioxide (TiO2) incorporated blend membrane electrolytes has been investigated. Various characterizations were used to determine the structural, morphological and thermal characteristics of the prepared composite electrolytes. Proton conductivity, relaxation dynamics and dielectric measurements on polymer composites were performed by varying blend compositions with a constant weight ratio of TiO2 filler. With respect to the pure sulfonated polyether ether ketone (SPEEK), blend ratios including 5 % and 10 % PVDF improved the ionic conductivity and dielectric response. Nevertheless, compositions with 15 % or more PVDF showed notable decreases in both characteristics. The SP10-TO electrolyte exhibited the highest conductivity, reaching 2.47 × 10⁻⁴ S/m at 1 MHz and 300 K. By hydrogen bonding, the ideal PVDF content enhanced ion transport and water retention in the SPEEK matrix. Ionic mobility was supported by TiO2, which further improved water dispersion. However, too much PVDF stiffened the polymer structure, which reduced conductivity and limited water movement. SP10-TO showed the highest dielectric constant (ε') value of 6052.5 at 300 K and 20 Hz. ε' decreased with increasing temperature and frequency due to reduced dipole alignment. Loss tangent (tanδ), a measure of relaxation dynamics, showed that the ideal blend composition had the shortest relaxation time, as 4.91 × 10⁻⁵ s. Increased ionic conductivity was strongly correlated with this drop, which suggests rapid dipole relaxation. The results highlight PVDF role in optimizing SP-TO polymer electrolytes for energy storage and conversion.

Anahtar Kelimeler

PVDF | SPEEK | TiO2 | Proton conductivity | Dielectric polarization

Science Direct

BM Sürdürülebilir Kalkınma Amaçları

Atıf Sayıları
WoS	3
SCOPUS	5
Google Scholar	5

Impact of polymer blending on ionic conductivity and dielectric polarization of TiO2 incorporated SPEEK/PVDF electrolytes

Dergi Adı	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Yayıncı	Elsevier B.V.
Açık Erişim	Hayır
ISSN	0927-7757
E-ISSN	1873-4359
CiteScore	9,6
SJR	0,944
SNIP	0,999

Impact of polymer blending on ionic conductivity and dielectric polarization of TiO2 incorporated SPEEK/PVDF electrolytes

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