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Issue 6, 2020
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Synthesis of 3D marigold flower-like rGO/BN/Ni(OH)2 ternary nanocomposites for supercapacitor applications

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Abstract

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.

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

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Supplementary files

Article information


Submitted
11 Feb 2020
Accepted
09 Apr 2020
First published
13 Apr 2020

Sustainable Energy Fuels, 2020,4, 3090-3101
Article type
Paper

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

M. Krishnaveni, C. M. Suresh, J. J. Wu, A. M. Asiri, S. Anandan and M. Ashokkumar, Sustainable Energy Fuels, 2020, 4, 3090
DOI: 10.1039/D0SE00227E

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