PPy/SbOx-SnO2 Anot Aktif Malzemesinin Tek Basamakta Elektrokimyasal Sentezi ve Süperkapasitör Uygulaması

Yıl 2023, Cilt: 23 Sayı: 4, 898 - 913, 31.08.2023

Meliha Gözde Çekiç , Erhan Karaca , Nuran Özçiçek Pekmez

https://doi.org/10.35414/akufemubid.1240402

Öz

Bu çalışmada süperkapasitör anodu için pirol (Py), Sb(BF4)3 ve Sn(BF4)2 içeren TBABF4/asetonitril çözeltisinde (sentez çözeltisi) PPy, nano-SbOx ve nano-SnO2’nin eş zamanlı elektrokimyasal sentezi ile PPy/SbOx-SnO2 kompozit kaplı grafit elektrot hazırlandı. Çok döngülü dönüşümlü voltametri ile kalem ucu grafit elektrot yüzeyine sentezlenen kompozitin ve karşılaştırmak için PPy homopolimerinin elektrokimyasal özellikleri sulu 100 mM H2SO4 çözeltisinde CV, GCD ve EIS yöntemleri ile incelendi. 5 A g-1’de PPy/SbOx-SnO2 kompozit kaplı elektrodun spesifik kapasitansı 363,1 F g-1 iken PPy kaplı elektrodunki 304,7 F g-1’dır. FESEM, EDX, XRD ve XPS teknikleri kullanılarak grafit plaka yüzeyine sentezlenmiş PPy/SbOx-SnO2 kompozitinin karakterizasyonu gerçekleştirildi. Asimetrik süperkapasitör hücresi, anot aktif malzeme olarak grafit kağıt yüzeyinde PPy/SbOx-SnO2/CMC kompozit kaplama ve katot aktif malzeme olarak grafit kağıt yüzeyinde aktif karbon esaslı kaplama kullanılarak polivinil alkol (PVA)/H2SO4 jel elektroliti içinde hazırlandı. Burada mekanik dayanımını arttırmak için PPy/SbOx-SnO2 kompoziti CMC (karbosimetil selüloz) varlığında sentezlendi. Hücre, 2,5 A g-1’de 15,3 Wh kg-1 enerji yoğunluğu ve 1,77 kW kg-1 güç yoğunluğu sergiledi.

Anahtar Kelimeler

Antimon oksit-kalay oksit, Polipirol, Kompozit, Elektrosentez, Süperkapasitör

Destekleyen Kurum

Hacettepe Üniversitesi

Proje Numarası

FYL-2022-19924

Teşekkür

Bu çalışma, FYL-2022-19924 koduyla Hacettepe Üniversitesi BAP birimi tarafından desteklenmiştir.

One-step Electrochemical Synthesis of PPy/SbOx-SnO2 Anode Active Material and Supercapacitor Application

Öz

In this study, PPy/SbOx-SnO2 composite-coated graphite electrode was prepared for the supercapacitor anode by simultaneous electrochemical synthesis of PPy, nano-SbOx, and nano-SnO2 in TBABF4/acetonitrile solution containing pyrrole (Py), Sb(BF4)3, and Sn(BF4)2. The electrochemical properties of the composite, which was synthesized by multi-scan cyclic voltammetry on the pencil graphite electrode surface, were investigated in aqueous 100 mM H2SO4 solution using CV, GCD, and EIS methods by comparing them with that of the PPy homopolymer prepared in the same way. The specific capacitance of the PPy/SbOx-SnO2 composite-coated electrode was 363.1 F g-1 at 5 A g-1, while that of the PPy-coated electrode was 304.7 F g-1. The composite synthesized on the graphite plate surface was characterized using FESEM, EDX, XRD, and XPS techniques. The asymmetric supercapacitor cell was prepared in polyvinyl alcohol (PVA)/H2SO4 gel electrolyte using the PPy/SbOx-SnO2/CMC composite coating on the graphite paper surface as the active anode material and the activated carbon-based coating on the graphite paper surface as the active cathode material. Here, the PPy/SbOx-SnO2 composite was synthesized in the presence of CMC (carboxymethyl cellulose in order to increase its mechanical strength. The cell exhibited an energy density of 15.3 Wh kg-1 and a power density of 1.77 kW kg-1 at 2.5 A g-1.

Anahtar Kelimeler

Antimony oxide – tin oxide, Polypyrrole, Composite, Electrosynthesis, Supercapacitor

Proje Numarası

FYL-2022-19924

Kaynakça

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