Elektrokimyasal Olarak Eksfoliye Edilmiş Grafen-Kitosan Hidrojelinin Simetrik Süperkapasitör Uygulaması

Yıl 2022, Sayı: 33, 133 - 137, 31.01.2022

Ömer Sadak

https://doi.org/10.31590/ejosat.1036869

Öz

Bu çalışmada, çapraz bağlama reaktifi ile elektrokimyasal olarak pul pul dökülmüş grafen-kitosan hidrojel hazırlandı. Daha sonra, grafen-kitosan hidrojel kullanılarak simetrik bir katı hal süper kapasitör üretildi. Üretilen grafenin yüzey morfolojisi SEM ve TEM kullanılarak araştırıldı. Simetrik tamamen katı hal süper kapasitörünü oluşturduktan sonra cihaz, 1 mA g-1 akım yoğunluğunda spesifik kapasitansı (Cm)153.6 F g-1 olarak hesaplandı. 1000 ardışık döngüden sonra olağanüstü bir kapasitans tutulması, %97'nin üzerinde bir tutma ile gözlemlendi. Süper kapasitör, 3,47 kW kg-1 yüksek enerji yoğunluğunun yanı sıra 102,07 W kg-1 güç yoğunluğu sağlama yeteneğine sahiptir.

Anahtar Kelimeler

Grafen, Hidrojel, Süperkapasitör

Symmetric Supercapacitor Application of Electrochemically Exfoliated Graphene – Chitosan Hydrogel

Öz

In this work, electrochemically exfoliated graphene–chitosan hydrogel was prepared by a crosslinking reagent. Then, a symmetrical all-solid state supercapacitor was fabricated using graphene–chitosan hydrogel. Surface morphology of as-fabricated graphene was investigated using SEM and TEM. After constructing the symmetrical all-solid state supercapacitor, the device showed a specific capacitance (Cm) of 153.6 Fg-1 at 1 mAg-1 current density. A great capacitance retention after 1000 consecutive GCD cycles was observed with an over 97% of retention. The supercapacitor can carry a high energy density of 3.47 kWkg-1, as well as a high power density of 102.07 Wkg-1.

Anahtar Kelimeler

Graphene, Hydrogel, Supercapacitors.

Kaynakça

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