Naime ÖZDEMİR, Perihan YILMAZ ERDOĞAN, Huseyin ZENGİN, Abdulcabbar YAVUZ

Süperkapasitör Uygulamaları için Nikel/Nikel Köpük Elektrodun İyonik Sıvı İçerisinden Elektrokimyasal Olarak Sentezi

Nikel temelli elektrot, enerji depolama malzemeleri için kolin klorür ve üre bazlı iyonik sıvı içerisinden nikel köpük akım toplayıcı üzerine elektrokimyasal olarak depolandı. Kaplamaların KOH elektrolitinde nikel köpük üzerindeki elektrokimyasal davranışı, dönüşümlü voltametri tekniği ile incelendi. İyonik bir sıvıdan elektrodepolanan elektrotlar, pozitif potansiyelde (0 ile 0.6 V arasında) redoks reaksiyonuna sahip oldukları için katot elektrotu olarak kullanılabilir. SEM ile kaplanmamış ve kaplanmış nikel köpüğün yüzey morfolojisi incelendi. Nikel köpüğün kendisi 2B dökme nikelden daha büyük bir yüzey alanına sahiptir. Nikelin iyonik sıvıdan elektrodepolanmasında yüksek yüzey alanına sahip mikropartiküller elde edilmiştir. Bu yüzden nikel kaplı nikel köpük elektrot ile bazik elektrolit arasındaki iyon ve elektron transfer hızı artırıldı. Nikel temelli nikel köpük elektrotunun KOH elektroliti içerisindeki reaksiyon mekanizması, difüzyon kontrollü olarak gerçekleşti. Bağlayıcı içermeyen nikel köpük üzerindeki nikel bazlı elektrot, 5 mV s-1 tarama hızında 1055 F g-1'lik spesifik kapasitansa sahiptir. İyonik sıvı içerisinden nikel köpük yüzey üzerine elde edilen nikel temelli kaplamalar, enerji depolama cihazlarında katot elektrot olarak kullanılabilir.

Anahtar Kelimeler:

Elektrodepolama; Dönüşümlü voltametri; İyonik sıvı; Nikel köpük

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