超级电容器
制作
非阻塞I/O
材料科学
碳纳米纤维
纳米技术
纳米纤维
碳纤维
复合材料
电极
碳纳米管
复合数
化学
电容
有机化学
医学
替代医学
物理化学
病理
催化作用
作者
Nazish Parveen,Sajid Ali Ansari,Batool Taher Al-Abawi,Mohammad Omaish Ansari
标识
DOI:10.1016/j.est.2022.105619
摘要
Metal oxide nanosheets and nanoflakes are potentially active materials for the fabrication of supercapacitors electrode development owing to their large three dimensional (3D) surface area and high electrochemical activity. In this work, hierarchical three dimensional nanoflakes (H3DN) of nickel oxide (NiO) were designed and successfully grown on carbon microfibers (CMF) as a binder free electrode material i.e. [email protected] for supercapacitor applications via a facile and simple hydrothermal method. The reaction parameters were successfully optimized to obtain efficient growth, porous structure, and uniform morphology. The resulting optimized electrodes were characterized using various microscopic and spectroscopic techniques and further electrochemical supercapacitive performance were analyzed in half and full cell assemblies. The porous structure of the carbon microfiber could be effectively inherited and used as a binder free electrode, the three-electrode system exhibited satisfactory electrochemical performance with a high areal capacitance of 2322.6 mF/cm2 and an excellent cyclic stability with retention up to 87.40 %. In two-electrode symmetric supercapacitor system comprising [email protected] electrodes exhibited an excellent cyclic stability up to 79.1 % after 7000 cycles and the highest energy density of 154.1 mWh kg−1 at a power density of 2801.8 mWkg−1. The outstanding performance could be attributed to the 3D porous structure, nanoflake morphology, and good conductivity of the [email protected] electrodes, which could ensure a rapid transport of the ions and electrons. The obtained results demonstrate that [email protected] electrodes are potential candidates for energy storage applications.
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