Boron fosfat katkılı PVDf/Nafyon membranların proton değişim membranlı yakıt hücresi performansının incelenmesi

Yıl 2018, Cilt: 3 Sayı: 1, 8 - 16, 26.03.2018

Alpay Şahin

https://doi.org/10.30728/boron.340746

Öz

Bu çalışmada poliviniliden florür (PVDf) ve Nafyon bazlı kompozit membranlar çözelti döküm yöntemiyle sentezlenmiştir. Proton iletkenlik ve yakıt hücresi performansı gibi membran özelliklerini arttırmak amacıyla yapıya değişen oranlarda boron fosfat (%0, 2, 5, 10, 15 ve 25) katılmıştır. Sentezlenen membranlar su tutma kapasitesi, şişme özelliği, iyon değişim kapasitesi, proton iletkenlik ölçümleri ile karakterize edilip tekli hücrede yakıt hücresi performans analizleri gerçekleştirilmiştir. %10 BPO₄ katkılı membrandan diğer

membranlara göre daha iyi sonuçlar elde edilmiştir. Bu membran 80 °C’de %44,5 su tutma kapasitesine, %8,5 kalınlık değişimine, %0,15 yüzey alanı değişimine, 1,87 meq/g iyon değişim kapasitesine ve 0,0296 S/cm proton iletkenliğine sahiptir. Aynı membranın 80 °C çalışma sıcaklığı, %100 nemlilik ve 0,6 V hücre potansiyelinde akım yoğunluğu değeri 80 mA/cm², güç yoğunluğu ise 0,048 W/cm² olarak bulunmuştur. Bu özelliklerin yanı sıra %10 BPO₄ katkılı membran çok iyi oksidatif ve hidrolitik kararlılık göstermiştir. buna karşın

yaprak azot ve demir içerikleri arasında ise negatif ilişkiler tespit edilmiştir. 

Anahtar Kelimeler

Boron fosfat, poliviniliden florür, proton değişim membranlı yakıt hücresi, kompozit membran, proton iletkenlik, yakıt hücresi performansı

Investigation of fuel cell performance of proton change membranes of boron phosphate additive PVDF/Nafıon membranes

Öz

In this study, polyvinylidene fluoride (PVDF), nafion based and boron phosphate doped composite membranes were synthesized by solution casting method. Boron phosphate was added in different ratios (0, 2, 5, 10, 15 and 25%) to the membrane for improve membrane properties such as proton conductivity and fuel cell performance. The synthesized membranes were characterized by water uptake capacity, swelling properties, ion exchange capacity, proton conductivity measurements, and single cell performance

analyzes. As a result of characterization and performance experiments highest performance values are obtained for the membrane containing 10% boron phosphate. This membrane has 44.5% water uptake capacity, 8.5% change of thickness, 0.15% change of surface area, 1.87 meq/g ion exchange capacity and 0.0296 S/cm proton conductivity at 80 °C. The same membrane has 80 mA/cm² current density and 0.048 W/cm² power density at 80 °C cell temperature, 100% humidity and 0.6 V cell voltage. In addition to these properties, the 10% BPO₄ doped membrane showed very good oxidative and hydrolytic stability. 

Anahtar Kelimeler

Boron phosphate, polyvinylidene flourid, proton exchange membrane fuel cell, composite membrane, proton conductivity, fuel cell performance

Kaynakça

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