The electrochemical performance of various NiCo<inf>2</inf>O<inf>4</inf> nanostructures in hybrid supercapacitors: Investigating the impact of crystalline defects

Authors: Kannangara, Y.Y., Karunarathne, S., Wijesinghe, W.P.S.L., Sandaruwan, C., Ratwani, C.R., Kamali, A.R. and Abdelkader, A.M.

Journal: Journal of Energy Storage

Volume: 84

eISSN: 2352-152X

DOI: 10.1016/j.est.2024.110717

Abstract:

Binary metal oxides exhibit a compelling combination of features that make them highly attractive electrode materials for supercapacitors. Herein, a facile hydrothermal method is employed for the preparation of defect-rich hierarchical nanostructured NiCo2O4 with various morphologies, including urchin-like nanostructure, nanoflowers, and 2D nanosheets; and their electrochemical performances as electrodes for hybrid supercapacitor are studies. Notably, the supercapacitor based on the urchin-like nanostructure with high oxygen vacancies delivers a high gravimetric energy density of 45.2 Wh/kg at the power density of 750 W/kg, maintaining remarkable cycling stability. The electrode exhibits specific capacitance of 423.9 and 292.0 F/g at the current density of 1.5 and 7.5 A/g, respectively, with high capacitive retention of ≈ 94 % after 1500 cycles. Crystalline defects identified in nanostructured NiCo2O4 are suggested to significantly contribute to the high ionic/electrical conductivity and the electrochemical stability of the electrodes.

https://eprints.bournemouth.ac.uk/39680/

Source: Scopus

The electrochemical performance of various NiCo<sub>2</sub>O<sub>4</sub> nanostructures in hybrid supercapacitors: Investigating the impact of crystalline defects

Authors: Kannangara, Y.Y., Karunarathne, S., Wijesinghe, W.P.S.L., Sandaruwan, C., Ratwani, C.R., Kamali, A.R. and Abdelkader, A.M.

Journal: JOURNAL OF ENERGY STORAGE

Volume: 84

eISSN: 2352-1538

ISSN: 2352-152X

DOI: 10.1016/j.est.2024.110717

https://eprints.bournemouth.ac.uk/39680/

Source: Web of Science (Lite)