Production of Reduced Graphene Oxide/Zinc Oxide Composites and Super Capacitor Applications

Öz

In this work, reduced graphene oxide/zinc oxide (RGO/ZnO) composite materials were synthesized by hydrothermal method. Synthesized RGO/ZnO composites were used in electrode for super capacitor applications. RGO/ZnO composite materials are produced using different zinc sources (zinc nitrate, zinc chloride and zinc acetate) and effect of different zinc salts on capasitans value of RGO/ZnO electrodes was investigated. Characterization of RGO/ZnO composites was performed with XRD (X-ray diffraction) and SEM (scanning electron microscopy). Electrochemical properties of produced RGO/ZnO electrodes were analyzed in 6M KOH solution by cyclic voltammetry, electrochemical impedance and galvanostatic charge-discharge. Experimental results showed that RGO/ZnO composite electrode obtained by zinc nitrate salt reached maximum specific capacitance (52,71 F/g).

Anahtar Kelimeler

• RGO/ZnO,Composite,Hydrothermal method,Super Capacitor

İndirgenmiş Grafen Oksit/Çinko Oksit Kompozitlerin Üretimi ve Süper Kapasitör Uygulamaları

Öz

Bu çalışmada, indirgenmiş grafen oksit/çinko oksit (RGO/ZnO) kompozit malzemeleri hidrotermal yöntem kullanılarak sentezlenmiştir. Sentezlenen RGO/ZnO kompozitleri, süper kapasitör uygulamaları için elektrot yapımında kullanılmıştır. RGO/ZnO kompozit malzemeler farklı çinko kaynakları (çinko nitrat, çinko klorür ve çinko asesat) kullanılarak üretilip, farklı çinko tuzların RGO/ZnO elektrotların kapasitans değerleri üzerindeki etkisi araştırılmıştır. RGO/ZnO kompozitlerin karakterizasyonu XRD (X-ışını kırınımı) ve SEM (taramalı elektron mikroskopisi) ile gerçekleştirilmiştir. Üretilen RGO/ZnO elektrotların elektrokimyasal özellikleri döngüsel voltametri, elektrokimyasal empedans ve galvanostatik şarj-deşarj testleriyle 6M KOH çözeltisi içinde analiz edilmiştir. Yapılan analizler sonucunda; çinko nitrat tuzu kullanılarak elde edilen RGO/ZnO kompozit malzemesi ile oluşturulan elektrodun maksimum spesifik kapasitans değerine (52,71 F/g) ulaştığı belirlenmiştir.

Anahtar Kelimeler

• RGO/ZnO,Kompozit Malzeme,Hidrotermal Metod,Süper Kapasitör

Kaynakça

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