Synthesis of 3D marigold flower-like rGO/BN/Ni(OH) 2 ternary nanocomposites for supercapacitor applications

• Published in: Sustainable energy & fuels Vol. 4; no. 6; pp. 3090 - 3101
• Main Authors: Krishnaveni, Murugesan, Suresh, Cini M., Wu, Jerry J., Asiri, Abdullah M., Anandan, Sambandam, Ashokkumar, Muthupandian
• Format: Journal Article
• Language: English
• Published: London Royal Society of Chemistry 02.06.2020
• Subjects: Boron; Boron nitride; Calendula; Capacitance; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrochemistry; Electrode materials; Electrodes; Energy storage; Flux density; Graphene; Morphology; Nanocomposites; Nickel; Nickel compounds; Spectroscopy; Spectrum analysis; Supercapacitors; Three dimensional flow
• DOI: 10.1039/D0SE00227E
• ISSN: 2398-4902

Supercapacitors are efficient and developing energy storage devices. The main focus of this work was on the preparation of reduced graphene oxide supported boron nitride doped-nickel hydroxide [rGO/BN/Ni(OH) 2 ] nanocomposites through a hydrothermal approach, for studying their electrochemical behaviour and specific capacitance by fabricating supercapacitor devices. Pristine BN, BN/Ni(OH) 2 and rGO/Ni(OH) 2 nanocomposites were also prepared and their use as supercapacitor electrode materials was studied. The structural and morphological properties were characterized using various analytical tools. SEM images showed a spherical shape with a marigold flower-like morphology. The electrochemical behaviour was studied using cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy techniques. The specific capacitances of rGO/BN/Ni(OH) 2 in 0.5 M KOH, 1 M KOH, 3 M KOH, and 6 M KOH were 349, 297 F g −1 , 143 F g −1 , and 94 F g −1 , respectively. It was observed that the capacitance increased with a decrease in the electrolyte concentration and the maximum specific capacitance was noted in 0.5 M KOH. Also, a significant increase in energy density and power density in 0.5 M KOH was observed. These results demonstrate that rGO/BN/Ni(OH) 2 nanocomposites are a promising electrode material for high-performance energy storage devices.