Enhancement of the electrochemical properties of vanadium dioxide via nitrogen-doped reduced graphene oxide for high-performance supercapacitor applications

Loading...
Thumbnail Image

Authors

Sarr, Samba
Bakhoum, Daba T.
Sylla, Ndeye Fatou
Ndiaye, Ndeye M.
Tarimo, Delvina Japhet
Maphiri, Vusani M.
Ngom, Balla D.
Manyala, Ncholu I.

Journal Title

Journal ISSN

Volume Title

Publisher

Royal Society of Chemistry

Abstract

A one-step solvothermal approach was used to integrate nitrogen-doped reduced graphene oxide into vanadium dioxide (VO2) to prepare a V@XN-G (where X = 24, 48 and 96 and is the mass of urea as the nitrogen (N) source) nanocomposite material. After optimization, V@48N-G showed better performance with a specific capacitance of 197.4 F g 1 at 0.5 A g 1 in a wide working potential window of 0.0–0.8 V vs. silver/silver chloride and was adopted as a positive electrode. Thus, cocoa waste-based activated carbon (ACC) was investigated and considered a negative electrode in assembling an asymmetric full-cell V@48NG// ACC. The device exhibited good specific energy and power of 28.8 W h kg 1 and 425.1 W kg 1, respectively, at a voltage window and specific current of 1.7 V and 0.5 A g 1, respectively. Its cycling stability resulted in a Coulombic efficiency (CE) and capacitance retention (CR) of 99.8% and 73%, respectively, over 10000 galvanostatic charge/discharge cycles at 10 A g 1. Therefore, the V@48N-G//ACC device shows excellent electrochemical performance and is suitable for energy storage application technology.

Description

DATA AVAILABILITY : Data can be available upon request from the authors.

Keywords

Vanadium dioxide (VO2), Nitrogen (N) source), Activated carbon (ACC, Coulombic efficiency (CE), SDG-07: Affordable and clean energy, SDG-09: Industry, innovation and infrastructure

Sustainable Development Goals

SDG-07:Affordable and clean energy
SDG-09: Industry, innovation and infrastructure

Citation

Sarr, S., Bakhoum, D.T., Sylla, N.F. et al. 2024, 'Enhancement of the electrochemical properties of vanadium dioxide via nitrogen-doped reduced graphene oxide for high-performance supercapacitor applications', New Journal of Chemistry, vol. 48, no. 30, pp. 13492-13505, doi : 10.1039/d4nj01029a.