A novel β-MnO2 and carbon nanotube composite with potent electrochemical properties synthesized using a microwave-assisted method for use in supercapacitor electrodes. (25th July 2022)

• Record Type: Journal Article
• Authors: Ragupathi, Hariventhan; Arockiaraj M., Antony; Choe, Youngson
• Is Part Of: New journal of chemistry. Volume 46:Number 32(2022)
• Page Start: 15358
• Page End: 15366
• Publication Date: 2022-07-25
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj02579e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : In this work, we report the synthesis of a novel β-MnO2 /CNT nanocomposite with good electrical conductivity for high-performance supercapacitors via a microwave-assisted method. Abstract : In this work, we report the synthesis of a novel β-MnO2 /CNT nanocomposite with good electrical conductivity for high-performance supercapacitors via a microwave-assisted method. The structure and surface morphology of the synthesized nanocomposite were investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) analysis, and scanning electron microscopy (SEM). Furthermore, the electrochemical performance of both pure β-MnO2 and the β-MnO2 /CNT composite was tested by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge (GCD). The β-MnO2 /CNT composite electrode displays an enhanced specific capacitance of 263.8 F g −1 at 0.5 mA cm −2 . The β-MnO2 /CNT composite shows an outstanding capacitance retention and 98.7% capacitance can be retained after 5000 galvanostatic cycles in a neutral Na2 SO4 electrolyte. These remarkable electrochemical characteristics of β-MnO2 /CNTs proved that the microwave approach is a powerful tool for creating electrode composites. This study demonstrates the potential performance of nanostructured β-MnO2 /CNT electrodes in high-power-density supercapacitor applications.