Ayça TANRIVERDİ, Saniye TEKEREK

19328

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

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

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

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.
Keywords:

Boron, Boron doped ZnO, Supercapacitor electrode,

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Bor Dergisi-Cover
  • ISSN: 2149-9020
  • Yayın Aralığı: Yılda 4 Sayı
  • Başlangıç: 2016
  • Yayıncı: TENMAK Bor Araştırma Enstitüsü
Arşiv
Sayıdaki Diğer Makaleler

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Saip Nami KARTAL, Jeffrey J. MORRELL

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

Ayça TANRIVERDİ, Saniye TEKEREK

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Sinem UZUN

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Ayşegül ERDEM, Mehmet DOĞAN

Sıçanlarda borik asit, kalsiyum fruktoborat ve potasyum bor sitratın kemik sağlığı ve sistemik inflamatuvar belirteçler üzerine etkisi

Sevgi KARABULUT UZUNÇAKMAK