Grafit/PTFE destekli bor takviyeli çinko oksit elektrot üretimi ve borun süper kapasitör performansına etkisi

Yıl 2023, , 1 - 8, 31.03.2023

Ayça Tanrıverdi , Saniye Tekerek

https://doi.org/10.30728/boron.1168811

Öz

Bu çalışmada, bor katkılı çinko oksit (ZnO:B) parçacıklar hidrotermal yöntem ile çinko nitrat hekzahidrat (Zn(NO3)2.6H2O) öncü çözeltisi kullanılarak üretilmiştir. ZnO:B tozlarının sentezinde bor ağırlıkça %5, %10, %15 ve %20 oranlarında katkılanmıştır. Üretilen ZnO:B yapıların fiziksel karakterizasyonu X-ışını kırınımı (XRD) ve taramalı elektron mikroskopu (SEM) ile gerçekleştirilmiştir. Analiz sonuçlarından ZnO:B parçacıkların hekzagonal würtzide yapıda kristalleştiğini ve morfolojik yapılarının hekzagonal çubuk şeklinde olduğu gözlenmiştir. ZnO:B elektrotlar; %10 poli tetra florin etilen (PTFE), %20 iletken grafit ile %70 ZnO:B tozları karıştırılarak Ni köpük üzerine 1 cm2’ lik alan oluşturacak şekilde hazırlanmıştır. ZnO:B elektrotların kapasitans ölçümleri döngüsel voltametrisi (CV) yöntemi ile yapılmıştır. Ölçümler oda sıcaklığında gerçekleştirilip, elektrolit sıvısı olarak 6M KOH çözeltisi kullanılmıştır. Farklı bor oranlarında hazırlanan ZnO:B elektrotların elektrokimyasal özellikleri araştırılmıştır. Üretilen ZnO:B elektrotlarında bor konsantrasyonu arttıkça kapasitans değerlerinin sistematik bir şekilde arttığı gözlemlenmiştir. Ayrıca %20 bor katkılı ZnO parçacıklar kullanılarak elde edilen elektrotun maksimum spesifik kapasitans değerine (29,41 F/g) ulaştığı ve katkısız ZnO elektrota göre 5 kat daha iyi performans sağladığı gözlemlenmiştir.

Anahtar Kelimeler

Bor, Bor katkılı ZnO, Süperkapasitör elektrot

Destekleyen Kurum

Tübitak

Proje Numarası

113F044

Teşekkür

Çalışma Türkiye Bilimsel ve Teknolojik Araştırma Kurumu TÜBİTAK (Proje No: 113F044) tarafından desteklenmiştir.

Production of Boron Doped Zinc Oxide Electrode Using Zinc Nitrate Hexahydrate and Effect on Supercapacitor Performance

Öz

In this study, boron doped zinc oxide (ZnO:B) particles were produced by hydrothermal method using zinc nitrate hexahydrate (Zn(NO3)2.6H2O) precursor solution. In the synthesis of ZnO:B powders, boron was added at 5%, 10%, 15% and 20% by weight. Physical characterization of the produced ZnO:B structures was performed by X-ray diffraction (XRD) and scanning electron microscope (SEM). From the results of the analysis, it was observed that the ZnO:B particles crystallized in the hexagonal würtzide structure and their morphological structures were in the form of hexagonal rods. ZnO:B electrodes were prepared by mixing 10% poly tetra fluorine ethylene (PTFE), 20% conductive graphite and 70% ZnO:B powders to form an area of 1 cm2 on Ni foam. Capacitance measurements of ZnO:B electrodes were made by Iviumstat potentiostat/galvanostat cyclic voltammetry using a three-electrode arrangement. Measurements were made at room temperature and 6M KOH solution was used as the electrolyte liquid. The electrochemical properties of ZnO:B electrodes prepared at different boron ratios were investigated by examining the capacitance, impedance and charging/discharging curves. It was observed that the capacitance values of the produced ZnO:B electrodes increased systematically as the boron concentration increased. In addition, it has been observed that the electrode obtained by using 20% boron doped ZnO particles reaches the maximum specific capacitance value (29.41 F/g) and provides five-fold better performance than the undoped ZnO electrode.

Anahtar Kelimeler

Boron, Boron doped ZnO, Supercapacitor electrode

Proje Numarası

113F044

Kaynakça

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