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Design and synthesis of three-dimensional CoNi2S4@MoS2@rGO nanocomposites and its application in electrochemical supercapacitors by Maziar Farshadnia; Ali A. Ensafi; K. Zarean Mousaabadi; B. Rezaei is a Materials Science article available to read on EtoBox.

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A spongy nanostructure of graphene oxide was synthesized to enhance the porosity and surface area. Then, CoNi 2 S 4 and MoS 2 nanocomposites were fixed on the porous graphene oxide to increase the capacity and improve its performance as a substrate. Finally, they were integrated to produce the final nanocomposite. The presence of metal sulfides, as electroactive materials, promises a synergistic effect for use in supercapacitors by accelerating ion/electron diffusion rates and enlarging the active sites. The synthesized spongy nanocomposite (CoNi 2 S 4 @MoS 2 @rGO) was characterized by various techniques, including Raman spectroscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and electrochemical techniques. The results of our study showed that the spongy nanocomposite has a specific capacitance of 3268 F g -1 at 1.0 A g -1 in a 3.0 M KOH solution. In addition, it can sustain 93.6% stability of its initial capacity after 3000 consecutive charge-discharge cycles at a current density of 10.0 A g -1 . Also, the optimal potential window (from zero to 1.40 V) was determined in the asymmetric configuration of this electrode. The energy density o

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Author

Maziar Farshadnia; Ali A. Ensafi; K. Zarean Mousaabadi; B. Rezaei

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Materials Science (Physical Sciences)