Issue 36, 2023, Issue in Progress

Performance degradation study of NiCo2O4-based asymmetric supercapacitors

Abstract

The performance of NiCo2O4//GO asymmetric supercapacitors was found to decline after many tests. It was found that the performance of the GO electrode was almost unchanged, while the performance of the NiCo2O4 electrode declined rapidly. Therefore, porous spherical NiCo2O4 nanoparticles were synthesized via a simple hydrothermal method. A NiCo2O4//GO asymmetric supercapacitor was made, which can be charged and discharged 3000 times in the current density of 10 A gāˆ’1. The surface morphology, crystal structure and elemental composition were characterized by X-ray diffraction analysis, scanning electron microscopy and X-ray photoelectron spectroscopy. By comparing the surface morphology, crystal structure and elemental composition of the NiCo2O4 electrode before and after the cycle, it was found that the performance of NiCo2O4 electrode declines rapidly after the cycle due to the formation of new substances and the destruction of the crystal structure of NiCo2O4 electrode. Therefore, maintaining the stability of the crystal structure of the electrode material is an important means to ensure the stability of the performance of the supercapacitor. It provides a meaningful strategy for studying the degradation of supercapacitor electrode materials.

Graphical abstract: Performance degradation study of NiCo2O4-based asymmetric supercapacitors

Article information

Article type
Paper
Submitted
25 Jul 2023
Accepted
15 Aug 2023
First published
23 Aug 2023
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2023,13, 25018-25028

Performance degradation study of NiCo2O4-based asymmetric supercapacitors

G. Guo, Y. Mei, X. Chen, J. Liu and W. Liu, RSC Adv., 2023, 13, 25018 DOI: 10.1039/D3RA05013K

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