Issue 30, 2025, Issue in Progress

Investigating the synergistic effect of defect rich V2O5/MWCNTs heterostructure for improved electrochemical performance of supercapacitors

Abstract

The synergistic effect of V2O5 and multiwall carbon nanotubes (MWCNTs) offers a promising strategy to enhance the redox activity of electrode materials for high-performance supercapacitors. In this study, a simple, scalable, and cost-effective hydrothermal approach is employed to synthesize V2O5/MWCNTs heterostructure. The resulting heterostructure exhibits rich oxygen vacancy defects, improved conductivity, favorable structural characteristics, and abundant active sites. DFT study further demonstrate the excellent kinetics of V2O5/MWCNTs as compared to pristine V2O5 structure. Electrochemical analysis reveals that V2O5/MWCNTs electrode achieves good capacitance of 820 F g−1 at 1 A g−1, significantly outperforming pristine V2O5 (463 F g−1) in a 1.0 M neutral Na2SO4 solution. Moreover, the developed supercapacitor (V2O5/MWCNTs//AC) device shows a capacitance of 125 F g−1 at 1 A g−1. The device also delivers an efficient energy density of 39 Wh kg−1 at a power density of 805 W kg−1. Additionally, it exhibits outstanding cycling stability, retaining 93% of its capacity after 8000 cycles at 3 A g−1. These exceptional results highlight the potential of the V2O5/MWCNTs heterostructure as a viable electrode material for future energy devices.

Graphical abstract: Investigating the synergistic effect of defect rich V2O5/MWCNTs heterostructure for improved electrochemical performance of supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
14 May 2025
Accepted
07 Jul 2025
First published
14 Jul 2025
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2025,15, 24760-24768

Investigating the synergistic effect of defect rich V2O5/MWCNTs heterostructure for improved electrochemical performance of supercapacitors

U. Younas, S. Abbas, A. Zafar, S. Javed, A. Khalid, S. Hussain, S. Karim, Y. Faiz, F. Faiz, A. Safdar, A. Nisar and M. Ahmad, RSC Adv., 2025, 15, 24760 DOI: 10.1039/D5RA03394B

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