超级电容器
电容
材料科学
电极
功率密度
氧化铁
电流密度
氧化物
化学浴沉积
储能
沉积(地质)
化学工程
纳米技术
光电子学
薄膜
化学
功率(物理)
冶金
物理化学
生物
古生物学
物理
量子力学
沉积物
工程类
作者
A.A. Yadav,Y.M. Hunge,Seongjun Ko,Seok‐Won Kang
出处
期刊:Materials
[Multidisciplinary Digital Publishing Institute]
日期:2022-09-03
卷期号:15 (17): 6133-6133
被引量:22
摘要
Among energy storage devices, supercapacitors have received considerable attention in recent years owing to their high-power density and extended cycle life. Researchers are currently making efforts to improve energy density using different asymmetric cell configurations, which may provide a wider potential window. Many studies have been conducted on positive electrodes for asymmetric supercapacitor devices; however, studies on negative electrodes have been limited. In this study, iron oxides with different morphologies were synthesized at various deposition temperatures using a simple chemical bath deposition method. A nanosphere-like morphology was obtained for α-Fe2O3. The obtained specific capacitance (Cs) of α-Fe2O3 was 2021 F/g at a current density of 4 A/g. The negative electrode showed an excellent capacitance retention of 96% over 5000 CV cycles. The fabricated asymmetric solid-state supercapacitor device based on α-Fe2O3-NF//Co3O4-NF exhibited a Cs of 155 F/g and an energy density of 21 Wh/kg at 4 A/g.
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