Bir Yük Depolama Elektrodu Olarak Co3O4 Sentezi İçin Eriyik Tuz Yaklaşımı

Year 2023, Volume: 23 Issue: 5, 1256 - 1266, 30.10.2023

Ümran Kurtan

https://doi.org/10.35414/akufemubid.1275507

Abstract

Yük depolama elektrotları olarak kobalt oksit (Co3O4) nanokürelerini sentezlemek için çok yönlü bir
eriyik tuz yöntemi hedeflenmiştir. Co3O4 nanoküreleri KNO3 erimiş tuzunda sadece tek adımda 5 dakika
içerisinde hazırlanmıştır. Nanokürelerin ortalama boyut dağılımı yaklaşık 80-130 nm’dir. Kobalt oksidin
spesifik kapasitansı 6 M KOH elektrolitinde 10 mV/s'de 285 F/g ve 0.5 A/g'da 171 F/g olarak bulunmuş
ve dış ve iç yüzey kapasitif katkılarını anlamak için Trasatti yöntemi kullanılmıştır. Malzeme orta seviyede
bir kapasite koruması (5 A/g’da %63.1) ve iyi bir döngüsel kararlılık (1200 çevrim sonrası %90.5)
göstermiştir. Bu deneysel çalışma herhangi bir çözücü kullanımını gerektirmemektedir ve bu nedenle
enerji depolama alanında iyi elektrokimyasal özelliklere sahip çeşitli geçiş metal oksitlerinin
hazırlanması için yeşil ve sürekli bir yaklaşım sağlayabilir.

Keywords

Eriyik Tuz Yöntemi, Kobalt Oksit, Elektrot, Enerji Depolama

Molten Salt Approach for Co3O4 Synthesis as a Charge Storage Electrode

Abstract

A versatile molten salt method was targeted to fabricate the cobalt oxide (Co3O4) nanospheres as
charge storage electrodes. The Co3O4 nanospheres were prepared in KNO3 molten salt in only one step
within 5 minutes. The nanospheres were with an average size distribution of almost 80-130 nm. The
specific capacitance of cobalt oxide was found to be 285 F/g at 10 mV/s and 171 F/g at 0.5 A /g in 6 M
KOH and the Trasatti method was used to understand the outer and inner surface capacitive
contributions. The material possessed a moderate rate capability (63.1% at 5 A/g) and had good cyclic
stability (90.5% after 1200 cycles). This experimental study does not require any solvent usage and thus
can provide a green and continuous approach for the preparation of various transition metal oxides
with good electrochemical properties in the energy storage field.

Keywords

Molten Salt Method, Cobalt Oxide, Electrode, Energy Storage

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