Serkan DEMİREL

PVA-Bloedite [Na2X(SO4)2 (X= Ni, Mg)] Jel Elektrolitlerin Kapasitör Uygulamaları

Bloedite tipi olarak adlandırılan [Na2M(SO4)2.(4H2O) (M= Mn, Zn, Ni, Cu, Fe, Co)] malzemeler teknolojik olarak sensör ve enerji depolama sistemlerinde aktif olarak kullanılabilmektedir. Bu kapsamda Na2X(SO4)2.(4H2O) (X=Mg, Ni) bloedite malzemelerinin jel forma getirilerek kapasitör elektroliti özellikleri incelenmiştir. Polivinil Alkol (PVA) ile jel forma getirilen Ni ve Mg-bloedite yapılarının cv ölçümleri yapılmış ve ±1 V bölgesi içinde kalıcı akım düzlüklerine sahip oldukları belirlenmiştir. Kapasitör yapımında paslanmaz çelik folyolar elektrot olarak kullanılmıştır ve yapılan kapasite ölçümlerinde Ni-bleodite ~28 mFg-1, Mg-bleodite ~25 mFg-1 deşarj kapasitans değerlerine ulaşmıştır. Şarj-deşarj döngüsel kapasitans değeri belirleme çalışmaları kapsamında, 50 döngü sonunda Ni-bloedite yapısının Mg-bloedite yapısına göre iki kattan daha fazla yüksek kapasitans değeri sağladığı belirlenmiştir. Bu farklılık jel elektrolit viskozitesi ile ilişkilendirilmiştir. Yapılan çalışmalar sonucunda PVA-Bloedite yapılı malzemelerin kapasitör enerji depolama sistemlerinde jel elektrolit olarak kullanılmasına uygun olduğu belirlenmiştir.

Anahtar Kelimeler:

Bloedite, Jel Elektrolit, Kapasitör

Capacitor Applications of PVA-Bloedite [Na2X(SO4)2 (X= Ni, Mg)] Gel Electrolytes

The bloedite type [Na2M(SO4)2.(4H2O) (M = Mn, Zn, Ni, Cu, Fe, Co)] materials are actively used in technology as sensors and energy storage materials. In this context, bloedite Na2X(SO4) 2. (4H2O) (X = Mg, Ni) materials were transformed into a gel form with Polyvinyl Alcohol (PVA), and, their capacitor electrolyte properties were examined. According to cv measurement results, it was determined that Ni and Mg-bloedite structures had permanent current regions in ±1 V range. In the experimental capacitor construction, stainless steel foils were used as electrodes. Ni-bleodite reached ~ 28 mF g-1, and, Mg-bleodite ~ 25 mF g-1 discharge capacitance values. The cycle life studies show that after 50 cycles, Ni-bloedite structure provide more than twice capacitance value compared to Mg-bloedite structure. This difference has been associated with gel electrolyte viscosity. As result of the studies, it has been determined that PVA-Bloedite structure are suitable for use as a gel electrolyte in capacitor energy storage systems.

Keywords:

Bloedite, Gel Electrolyte, Capacitor,

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