Dielectric and proton conductivity potential of sulfonated silica-enhanced chitosan/butylimidazolium tetrafluoroborate membrane electrolytes

Güzel, İlkay; Yetiş, Arzunur Sıla; Abacı, Ufuk; OKKAY, Hikmet; YILMAZOĞLU, Mesut

doi:10.1016/j.colsurfa.2025.138254

Dielectric and proton conductivity potential of sulfonated silica-enhanced chitosan/butylimidazolium tetrafluoroborate membrane electrolytes

Yazarlar (5)

İlkay Güzel
Yalova Üniversitesi, Türkiye

Arzunur Sıla Yetiş
Yalova Üniversitesi, Türkiye

Prof. Dr. Ufuk Abacı Kocaeli Üniversitesi, Türkiye

Doç. Dr. Hikmet OKKAY Yalova Üniversitesi, Türkiye

Doç. Dr. Mesut YILMAZOĞLU Yalova 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 Dergi Bilgileri (2025)
Dergi Tarandığı Indeksler	SCI-Expanded
Makale Dili	İngilizce	Basım Tarihi	12-2025
Kabul Tarihi	–	Yayınlanma Tarihi	01-12-2025
Cilt / Sayı / Sayfa	727 / 1 / –	DOI	10.1016/j.colsurfa.2025.138254
Makale Linki	https://doi.org/10.1016/j.colsurfa.2025.138254
UAK Araştırma Alanları	Polimer Bilimi ve Teknolojileri Enerji

Özet

In this work, chitosan (CS)-based composite polymer electrolytes were developed by incorporating n-butylimidazolium tetrafluoroborate ionic liquid (ButIm-BF4, IL) and sulfonated silica (sSiO2) to achieve efficient anhydrous proton conduction. Composite membranes were prepared via solution casting method and characterized by FTIR, XRD, SEM, and TGA for structural, morphological and thermal evaluations. Proton conductivity tests in the 300–430 K and 20 Hz-1 MHz ranges revealed that the CS-IL-S(7.5) membrane, containing 7.5 wt% sSiO2, exhibited the highest proton conductivity (σ) (1.2 mS/cm) corresponding to ∼330-fold higher than neat CS (3.65 ×10⁻³ mS/cm) and ∼6.5-fold higher than CS-IL (1.84 ×10⁻¹ mS/cm). Dielectric analyses demonstrated a maximum dielectric constant (ε′) of 2.19 × 10⁶ at 20 Hz and 300 K for CS-IL-S(7.5). A loss tangent (tanδ) of ∼7.6 with an ultrafast relaxation time (τ) of 3.98 × 10⁻⁷ s confirmed high ionic mobility with minimal polarization losses. Structural and morphological studies indicated amorphous character and interconnected conduction pathways, while thermal analysis showed maintained stability. These results highlight CS/IL/sSiO2 membranes as eco-friendly and cost-effective candidates for electrochemical energy storage devices operating under anhydrous and high-temperature conditions.

Anahtar Kelimeler

Science Direct

BM Sürdürülebilir Kalkınma Amaçları

Atıf Sayıları
Scopus	1

Dielectric and proton conductivity potential of sulfonated silica-enhanced chitosan/butylimidazolium tetrafluoroborate membrane electrolytes

Dergi Adı	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Kısa Adı	COLLOID SURFACE A
Yayıncı	ELSEVIER
Açık Erişim	Hayır
ISSN	0927-7757
E-ISSN	1873-4359
Wos Quartile	Q2
Scopus Quartile	Q1
Tarandığı Indeksler	SCIE , Scopus
WoS Kategoriler	CHEMISTRY, PHYSICAL
Scopus Kategoriler	PHYSICAL AND THEORETICAL CHEMISTRY \| COLLOID AND SURFACE CHEMISTRY \| SURFACES AND INTERFACES

Dielectric and proton conductivity potential of sulfonated silica-enhanced chitosan/butylimidazolium tetrafluoroborate membrane electrolytes

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