期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 28, 期 47, 页码 66888-66900出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-021-15276-5
关键词
Banana peel waste; Porous carbon; Nickel oxide; Cyclic voltammetry; Electrochemical impedance spectroscopy
资金
- National Research Centre (NRC)
The NiO-porous carbon composite exhibits excellent electrochemical performance as a potential electrode material for supercapacitors. It shows remarkable specific capacitance, high rate capability, and superior cycle stability at high current densities, indicating its promising prospects in energy storage applications.
Lithium-ion batteries and supercapacitors are examples of energy storage technologies that have a lot of promise in a variety of applications. Herein, NiO-porous carbon composites were prepared by a green and cost-effective facile synthesis route from banana peel waste materials. The surface morphology and chemical composition of the NiO-porous carbon composite were investigated using a scanning electron microscope (SEM) and energy dispersive x-ray analysis (EDX). The prepared samples were also described through Fourier transform infrared (FTIR) spectroscopy, x-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), and surface area measurements. The electrochemical behavior of prepared materials was studied by cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance (EIS) to test their applicable suitability as supercapacitor electrode. PC-NiO (3) composite exhibits a remarkable specific capacitance of 811 F/g at a current density of 1 A/g. The specific capacitance of PC-NiO (3) is 5.3 times more than that of PC material at 1.0 A/g. Furthermore, the PC-NiO (3) composite material still exhibits a specific capacitance of 780 F/g at 5.0 A/g, high rate capability of 84.55% retention at a high current density of 10.0 A/g and superior cycle stability at 1000 cycles. Based on its high specific capacitance, the NiO-porous carbon nanocomposite is one of the most promising electrode materials for supercapacitors, according to the above results.
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