Using graphitic carbon nitride/graphene hybrid structures to ımprove supercapacitor performance

Öz

Designing high-efficiency, low-cost hybrid nanostructures with suitable morphology and excellent conductivity is promising for electrodes used in electrochemical storage devices. This study includes the results obtained from electrochemical studies and the production of a three-dimensional (3D) hybrid structure consisting of graphitic carbon nitride (g-C3N4) and reduced graphene oxide hydrogel (rGOH) structures for supercapacitor (SC) applications. As it is known, increasing the amount of specific capacitance in the supercapacitor is directly proportional to the contact surface between the electrode and the electrolyte used in the structure. Therefore, since the rGOH structure has a high surface area and thermal stability, and g-C3N4 increases the electrochemical activity in supercapacitors, the specific capacitance value of the electrode obtained by combining the existing structures was measured. By producing this electrode to be used as a supercapacitor, a high specific capacitance value was obtained. As a result of electrochemical studies, a high capacitance value of 157.4 F/g was obtained at 5 mVs-1 scanning speed of the g-C3N4@rGOH hybrid structure. It also demonstrated an unmatched cyclic stability performance of 112% at 1000 cycles.

Anahtar Kelimeler

• Graphitic carbon nitride
• Energy storage
• Supercapacitor
• Hybrit electrode

Süperkapasitör performansını artırmak için grafitik karbon nitrür /grafen hibrit yapılarının kullanılması

Öz

Uygun morfolojiye ve mükemmel iletkenliğe sahip yüksek verimli, düşük maliyetli hibrit nanoyapılar tasarlamak, elektrokimyasal depolama cihazlarında kullanılan elektrotlar için umut vericidir. Bu çalışma, süperkapasitör (SK) uygulamaları için grafitik karbon nitrür (g-C3N4) ve indirgenmiş grafen oksit hidrojel (rGOH) yapılarından oluşan üç boyutlu (3B) hibrit yapının üretimi ve elektrokimyasal çalışmalardan elde edilen sonuçları içermektedir. Bilindiği üzere, süperkapasitörde spesifik kapasitans miktarının artırılması yapıda kullanılan elektrot-elektrolit arasındaki temas yüzeyi ile doğru orantılıdır. Bu yüzden, rGOH yapısının yüksek yüzey alanı ve termal stabiliteye sahip olması, g-C3N4‘ün de süperkapasitörlerde elektrokimyasal aktiviteyi arttırmasından dolayı, mevcut yapılar bir araya getirilerek elde edilen elektrotun spesifik kapasitans değeri ölçülmüştür. Süperkapasitör olarak kullanılacak bu elektrotun üretilmesiyle, yüksek spesifik kapasitans değeri elde edilmiştir. Elektrokimyasal çalışmalar sonucunda, g-C3N4@rGOH hibrit yapısının 5 mVs-1 tarama hızında 157.4 F/g yüksek kapasitans değeri elde edilmiştir. Ayrıca 1000 döngüde %112’lik benzersiz bir döngüsel stabilite performansı sergilemiştir.

Anahtar Kelimeler

• Grafitik Karbon Nitrür
• Enerji Depolama
• Süperkapasitör
• Hibrit Elektrot

Kaynakça

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