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