Susuz Proton Değişim Membran Uygulamaları için 1,2,3-Triazol Esaslı İyonik Sıvı Katkılı Sülfone Polisülfon (SPSU) Elektrolitlerin Geliştirilmesi

Bu çalışmada triazol esaslı iyonik sıvı katkılı sülfone polisülfon (SPSU) kompozit membranlar, yüksek sıcaklık proton değişim membran yakıt hücresi (PEMYH) sistemleri için değerlendirilmiştir. Kompozit membranların hazırlanmasında, aromatik polisülfon (PSU) polimer matrisinin sülfonasyonuyla elde edilen SPSU kullanılmıştır. Yüksek sıcaklıklarda geliştirilmiş proton iletimi için kompozit elektrolitler, çalışma kapsamında sentezlenen üç farklı triazol esaslı iyonik sıvı (TIL-1, TIL-2 ve TIL-3) ile katkılanmış ve kompozit membran serileri oluşturulmuştur. Yapısal, termal ve mekanik karakterizasyonlar sırasıyla Fourier dönüşüm kızılötesi spektroskopisi (FTIR), termogravimetrik analiz (TGA) ve dinamik mekanik analiz (DMA) ile gerçekleştirilmiştir. Proton iletkenlikleri geniş bir sıcaklık aralığında (380-450 K) ölçülmüş ve kompozit membranların yüksek sıcaklık PEMYH sistemlerinde etkinliği değerlendirilmiştir. TGA analizi sonucunda, tüm triazol esaslı iyonik sıvı katkılı membran serileri, yüksek termal dayanım sergilemiştir. Yüksek sıcaklık proton iletkenlik ölçümleri ile kompozit yapıların proton iletkenliklerinin büyük ölçüde geliştirildiği (SPSU için 8.05 mS/cm; SPSU/TIL-3(1.0) için 58.1 mS/cm) ve elde edilen membranların yüksek sıcaklık PEMYH şartlarında alternatif olabileceği görülmüştür.

Anahtar Kelimeler:

Triazol, İyonik sıvı, Polimer elektrolit, Polisülfon, Proton iletkenliği

Development of 1,2,3-Triazole Based Ionic Liquid Doped Sulfonated Polysulfone (SPSU) Electrolytes for Anhydrous Proton Exchange Membrane Applications

In this study, triazole based ionic liquid doped sulfonated polysulfone (SPSU) composite membranes were evaluated for high temperature proton exchange membrane fuel cell (PEMFC) systems. SPSU obtained by sulfonation of aromatic polysulfone (PSU) polymer matrix was used in the preparation of composite electrolytes. Sulfonated polymer matrices were doped with three different triazole-based ionic liquids (TIL-1, TIL-2 and TIL-3) synthesized within the scope of the study and composite membrane series were formed. Structural, thermal and mechanical characterizations were performed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA), respectively. Proton conductivities were measured over a wide temperature range (380-450 K) and the effectiveness of composite membranes in high temperature PEMFC systems was evaluated. As a result of TGA analysis, all triazole based ionic liquid doped membrane series exhibited high thermal resistance. It was observed that the proton conductivity of the composite structures was greatly improved with high temperature proton conductivity measurements (8.05 mS/cm for SPSU; 58.1 mS/cm for SPSU/TIL-3(1.0)) and the obtained membranes could be an alternative in high temperature PEMFCs.

Keywords:

Triazole, Ionic liquid, Polymer electrolyte, Polysulfone, Proton conductivity,

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