HTC@PbS Süperkapasitör Elektrot Yapıların Performansları

Öz

Çevre ve ekonomi üzerindeki olumsuz etkileri en aza indirmek ve enerji tüketimini azaltmak amacıyla, gelişmiş, düşük maliyetli ve sürdürülebilir enerji depolama cihazları geliştirmek büyük önem taşımaktadır. Günümüzde süperkapasitörler ve şarj edilebilir bataryalar, iki ana umut vadeden enerji depolama çözümü olarak öne çıkmaktadır. Yüksek performanslı elektrokimyasal enerji depolama sistemleri üretmenin anahtarı, elektrokimyasal olarak aktif malzemelerdir. Elektrokimyasal performanslarını artırmak amacıyla, geniş spesifik yüzey alanına ve kontrol edilebilir gözenek boyutlarına sahip gözenekli yapılar tasarlamak gerekmektedir. Bu çalışmada, hidrotermal karbon (HTC) katkılı kurşun sülfür (HTC@PbS) ince film süperkapasitör elektrot yapıları, sprey yöntemiyle 100 °C'deki cam taban malzemeleri üzerine, sprey sayısına bağlı olarak üretilmiştir. Yüzey morfolojileri, bileşim analizleri ve kristal yapıları sırasıyla FESEM, EDX ve XRD ile karakterize edilmiştir. 2 puf ve 3 puf HTC@PbS ince film süperkapasitör elektrot yapılarının spesifik kapasitans (Cs) değerleri, Keithley 2400 sourcemeter ve 2100/220 Keithley multimetre kullanılarak, düzlemsel zamana bağlı I-V yöntemi ile -1,4 V ile +0,2 V potansiyel aralığında, 5 mV/s, 10 mV/s, 25 mV/s, 50 mV/s ve 100 mV/s tarama hızlarında ölçülmüştür. 2 puf ve 3 puf HTC@PbS ince film süperkapasitör elektrot yapılarında kaplanan aktif kütle miktarları sırasıyla 0,0566 g ve 0,0185 g olarak belirlenmiştir. 2 puf ve 3 puf sprey için 5 mV/s tarama hızında elde edilen spesifik kapasitans değerlerinin 873 F/g ve 919 F/g olarak en yüksek değerlere sahip olduğu görülmektedir.

Anahtar Kelimeler

• Kurşun Sülfür
• Hidrotermal Karbon
• Enerji Depolama
• Süperkapasitör Elektrot
• Spesifik Kapasitans

Destekleyen Kurum

KARABÜK ÜNİVERSİTESİ BAP KOORDİNATÖRLÜĞÜ

Proje Numarası

KBÜBAP-25-YL-020

Teşekkür

Bu çalışma, Karabük Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi tarafından KBÜBAP-25-YL-020 proje kodu ile desteklenmiştir. Yazarlar, finansal destekleri için KBÜ-BAP birimine teşekkür ederler. Ayrıca, deneysel çalışmalarda kullanılan ekipmanlar için Karabük Üniversitesi Demir ve Çelik Enstitüsü'ne teşekkür ederiz.

Performances of HTC@PbS Supercapacitor Electrode Structures

Öz

To mitigate adverse environmental and economic impacts and to reduce energy consumption, the development of innovative, affordable, and sustainable energy storage systems is crucial. Currently, rechargeable batteries and supercapacitors are recognized as the two leading energy storage solutions. The production of high-performance electrochemical energy storage systems relies heavily on electrochemically active materials. To enhance their electrochemical capabilities, it is essential to create porous structures featuring a high specific surface area and adjustable pore dimensions. In this study, hydrothermal carbon (HTC) doped lead sulfide (HTC@PbS) thin film supercapacitor electrode structures were fabricated on glass substrates at 100 °C using the spray method, with their properties varying depending on the number of sprays. Surface morphologies, compositional analyses, and crystal structures were characterized by FESEM, EDX mapping, and XRD, respectively. The specific capacitance (Cs) values for the 2- and 3-spray HTC@PbS thin film supercapacitor electrode structures were measured using the in-plane time-dependent I-V method, employing a Keithley 2400 sourcemeter and a Keithley 2100/220 multimeter. Measurements were conducted in the potential range of -1.4 V to +0.2 V at scan rates of 5 mV/s, 10 mV/s, 25 mV/s, 50 mV/s, and 100 mV/s. For the 2- and 3-spray HTC@PbS thin film supercapacitor electrode structures, the amount of active mass coated was determined to be 0.0566 g and 0.0185 g, respectively. The specific capacitance values for the 2- and 3-spray samples, measured at a 5 mV/s scan rate, showed the highest values of 873 F/g and 919 F/g.

Anahtar Kelimeler

• Lead sulfide
• Hydrothermal Carbon
• Energy Storage
• Supercapacitor Electrode
• Specific Capacitance

Destekleyen Kurum

KARABÜK ÜNİVERSİTESİ BAP KOORDİNATÖRLÜĞÜ

Proje Numarası

KBÜBAP-25-YL-020

Teşekkür

This study was supported by Karabük University Scientific Research Projects Coordination with the project code KBÜBAP-25-YL-020. The authors would like to thank the KBÜ-BAP unit for their financial support. We would also like to thank Karabük University Iron and Steel Institute for the equipment used during the experimental studies.

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