Dielectric properties and conductivity of PVdF-co-HFP/LiClO4 polymer electrolytes

Ulutaş, Kemal; Yahsi, Ugur; Deligöz, Hüseyin; Tav, Cumali; Yllmaztürk, Serpil; YILMAZOĞLU, Mesut; Erdemci, Gonca; Coşkun, Bilgehan; Yakut, Şahin; Deǧer, Deniz

doi:10.1139/cjp-2017-0678

Dielectric properties and conductivity of PVdF-co-HFP/LiClO4 polymer electrolytes

Yazarlar (10)

Kemal Ulutaş Istanbul Üniversitesi, Türkiye

Ugur Yahsi Marmara Üniversitesi, Türkiye

Hüseyin Deligöz Istanbul Üniversitesi, Türkiye

Cumali Tav Marmara Üniversitesi, Türkiye

Serpil Yllmaztürk Istanbul Üniversitesi, Türkiye

Doç. Dr. Mesut YILMAZOĞLU Yalova Üniversitesi, Türkiye

Gonca Erdemci University Of California, Los Angeles, Amerika Birleşik Devletleri

Bilgehan Coşkun Marmara Üniversitesi, Türkiye

Şahin Yakut Istanbul Üniversitesi, Türkiye

Deniz Deǧer Istanbul Üniversitesi, Türkiye

Makale Türü	Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı	CANADIAN JOURNAL OF PHYSICS (Q3)
Dergi ISSN	0008-4204 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler	SCI-Expanded
Makale Dili	İngilizce	Basım Tarihi	01-2018
Cilt / Sayı / Sayfa	96 / 7 / 786–791	DOI	10.1139/cjp-2017-0678
Makale Linki	http://dx.doi.org/10.1139/cjp-2017-0678

Özet

In this study, it was aimed to prepare a series of PVdF-co-HFP based electrolytes with different LiClO4 loadings and to investigate their chemical and electrical properties in detail. For this purpose, PVdF-co-HFP based electrolytes with different LiClO4 loadings (1-20 weight %) were prepared using solution casting method. X-ray diffraction (XRD), differential scanning calorimetry, and thermogravimetric (TGA)-differential thermal and dielectric spectroscopy analysis of PVdF-co-HFP/LiClO4 were performed to characterize their structural, thermal, and dielectric properties, respectively. XRD results showed that the diffraction peaks of PVdF-co-HFP/LiClO4 electrolytes broadened and decreased with LiClO4. TGA patterns exhibited that PVdF-co-HFP/LiClO4 electrolytes with 20 wt % of LiClO4 had the lowest thermal stability and it degraded above 473 K, which is highly applicable for solid polymer electrolytes. Dielectric constant, dielectric loss, and conductivities were calculated by measuring capacitance and dielectric loss factor of PVdF-co-HFP/LiClO4 in the range from 10 mHz to 20 MHz frequencies at room temperature. In consequence, conductivities of PVdF-co-HFP/LiClO4 increased significantly with frequency for low loading of LiClO4 while they only slightly changed with higher LiClO4 addition. On the other hand, dielectric constant values of PVdF-co-HFP/LiClO4 films decreased with frequency whereas they rose with LiClO4 addition. The dielectric studies showed an increase in dielectric constant and dielectric loss with decreasing frequency. This result was attributed to high contribution of charge accumulation at the electrode-electrolyte interface. The electrolyte showed the maximum conductivity of 8 × 10^-2 S/cm at room temperature.

Anahtar Kelimeler

conducting polymers | impedance spectroscopy | dielectric properties | ionic conductivity

BM Sürdürülebilir Kalkınma Amaçları

Atıf Sayıları
WoS	15
SCOPUS	16
Google Scholar	14

Dielectric properties and conductivity of PVdF-co-HFP/LiClO4 polymer electrolytes

Dergi Adı	CANADIAN JOURNAL OF PHYSICS
Yayıncı	National Research Council of Canada
Açık Erişim	Hayır
ISSN	0008-4204
E-ISSN	1208-6045
CiteScore	2,2
SJR	0,215
SNIP	0,456

Dielectric properties and conductivity of PVdF-co-HFP/LiClO4 polymer electrolytes

Paylaş