Tailored proton conductive membranes of PVdF-co-HFP: Investigating the synergistic effects of ammonium tetrafluoroborate and phosphoric acid dopants on dielectric characteristics
Yazarlar (4)
Doç. Dr. Mesut YILMAZOĞLU Yalova Üniversitesi, Türkiye
Prof. Dr. Ufuk Abaci Kocaeli Üniversitesi, Türkiye
Prof. Dr. Hamit ERDEMİ Yalova Üniversitesi, Türkiye
Dr. Öğr. Üyesi Ozan Çoban Gedik Üniversitesi, Türkiye
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Process Safety and Environmental Protection (Q1)
Dergi ISSN 0957-5820 Dergi Bilgileri (2024)
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce Basım Tarihi 11-2024
Kabul Tarihi – Yayınlanma Tarihi 01-11-2024
Cilt / Sayı / Sayfa 191 / 1 / 1994–2006 DOI 10.1016/j.psep.2024.09.112
Makale Linki https://doi.org/10.1016/j.psep.2024.09.112
UAK Araştırma Alanları
Polimer Bilimi
Özet
This study investigates the structural, thermal, and dielectric properties of pure PVdF-co-HFP matrix and its composite electrolytes, PVdF-co-HFP/NH4BF4[x], both before and after PA doping, using FTIR, SEM, TGA, and dielectric analyses. FTIR spectra reveal characteristic vibrational bands, confirming the presence of various functional groups and phases. SEM images display a smooth and homogeneous surface morphology for pure PVdF-co-HFP, while the composite electrolytes exhibit irregular dispersion of NH4BF4 salt and rougher surfaces upon PA doping. TGA analysis shows that the onset of thermal degradation occurs at approximately 370 ℃ for pure PVdF-co-HFP, while PA-doped samples demonstrate higher decomposition temperatures, exceeding 400 ℃ due to hydrogen bonding and ionic complex formation. The presence of NH4BF4 and PA doping also affects the crystallinity of the PVdF-co-HFP matrix, notably shifting the transition temperatures of the alpha and beta phases. Ionic conductivity measurements indicate that PA doping significantly enhances conductivity by increasing charge carrier concentration and facilitating ion transport. PA-doped PVdF-co-HFP/NH4BF4[10] showed the highest conductivity reaching 1.68 × 10−3 S.cm−1 at 1 MHz and 400 K. Dielectric studies reveal frequency-dependent behavior, with dielectric constant (ε') and loss (ε") showing distinct trends influenced by salt concentration and PA doping. The dielectric tangent loss (tanδ) of PA-doped PVdF-co-HFP/NH4BF4 composite membranes exhibits frequency and temperature dependence. At higher temperatures, tanδ increases with frequency, showing a resonance peak that shifts towards higher frequencies. The study elucidates the impact of PA doping on the structural, thermal, and electrochemical performance of PVdF-co-HFP/NH4BF4 composites, providing insights for their potential applications in advanced electrolyte systems.
Anahtar Kelimeler
Ammonium salt | Dielectric | Ionic conductivity | Phosphoric acid | PVdF-co-HFP
Science Direct
BM Sürdürülebilir Kalkınma Amaçları
Atıf Sayıları
Scopus 3
Tailored proton conductive membranes of PVdF-co-HFP: Investigating the synergistic effects of ammonium tetrafluoroborate and phosphoric acid dopants on dielectric characteristics
İletişim
  • Yalova Üniversitesi Rektörlüğü, Bahçelievler Mah. Çınarcık Yolu Caddesi No: 26 Merkez - YALOVA, 77200
  • unis@yalova.edu.tr 0226 815 50 00
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