Microwave‐assisted hydrothermal synthesis and characterisation of cobalt phosphate nanosheets as electrode material for high‐performance supercapacitors

Author:

Agudosi Elochukwu S.1ORCID,Goh Jia En2,Khalid Mohammad34ORCID,Ramam Koduri1ORCID,Sanhueza Felipe1ORCID

Affiliation:

1. Department of Materials Engineering, Faculty of Engineering University of Concepción Concepción Chile

2. Department of Chemical Process Engineering, Malaysia‐Japan International Institute of Technology (MJIIT) Universiti Teknologi Malaysia (UTM) Kuala Lumpur Malaysia

3. Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology Sunway University Bandar Sunway Selangor Darul Ehsan Malaysia

4. Materials and Manufacturing Research Group, James Watt School of Engineering University of Glasgow Glasgow UK

Abstract

AbstractIn this study, cobalt phosphate (Co3[PO4]2) nanosheets were synthesized through a microwave‐assisted hydrothermal method with enhanced electrochemical properties. The synthesis was carried out at different microwave heating times (3, 5, 10, and 15 min) at a fixed temperature of 200°C. The structural properties of the synthesized Co3(PO4)2 nanosheets were investigated via XRD, FESEM‐EDS and TEM studies, while the electrochemical parameters were evaluated through CV, GCD, and EIS in a standard 3‐electrode cell with 1 M KOH as an electrolyte at a room temperature. The results reveal that Co3(PO4)2 nanosheets synthesized at 5 min microwave heating time exhibited maximum electrochemical performance owing to its excellent structural and morphological properties and thus reported a specific capacity of 130.98 and 164.52 C/g at a scan rate of 10 mV/s and a current density of 1 A/g, respectively. Furthermore, a stability test of the synthesized electrode material reported excellent cyclic stability of the electrode with 101% retention of the initial value of its specific capacity after 1000 cycles.

Publisher

Wiley

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