Issue 27, 2018

NiMoO4@NiWO4 honeycombs as a high performance electrode material for supercapacitor applications

Abstract

In this study, we report a facile two-step fabrication of honeycomb-like NiMoO4@NiWO4 nanocomposites on Ni foam as the electrode for high-performance supercapacitor applications. Structural characterization and compositional analysis of the as-prepared NiMoO4@NiWO4 nanocomposites was performed using scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, cyclic voltammetry, galvanostatic charge–discharge cycling, and electrochemical impedance spectroscopy. The electrochemical properties of the as-synthesized NiMoO4@NiWO4 nanocomposites were studied in a 3 M KOH electrolyte solution for application as electrode material of supercapacitors. A maximum specific capacitance of 1290 F g−1 was achieved for NiMoO4@NiWO4 at a current density of 2 A g−1. This electrode exhibits excellent long cycle-life stability with 93.1% specific capacitance retention after 3000 cycles at a current density of 6 A g−1. Our studies indicate that the as-synthesized NiMoO4@NiWO4 nanocomposites could be a promising candidate as the electrode material in high-performance electrochemical energy storage applications.

Graphical abstract: NiMoO4@NiWO4 honeycombs as a high performance electrode material for supercapacitor applications

Supplementary files

Article information

Article type
Paper
Submitted
30 Mar 2018
Accepted
10 Jun 2018
First published
11 Jun 2018

Dalton Trans., 2018,47, 9057-9063

NiMoO4@NiWO4 honeycombs as a high performance electrode material for supercapacitor applications

A. E. Reddy, T. Anitha, C. V. V. Muralee Gopi, S. Srinivasa Rao and H. Kim, Dalton Trans., 2018, 47, 9057 DOI: 10.1039/C8DT01245H

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