Chemical synthesis of hierarchical NiCo2S4 nanosheets like nanostructure on flexible foil for a high performance supercapacitor

Abstract In this study, hierarchical interconnected nickel cobalt sulfide (NiCo 2 S 4 ) nanosheets were effectively deposited on a flexible stainless steel foil by the chemical bath deposition method (CBD) for high-performance supercapacitor applications. The resulting NiCo 2 S 4 sample was characte...

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Bibliographic Details
Published in:Scientific reports 2017-08, Vol.7 (1), p.1-10, Article 9764
Main Authors: Kim, D. -Y., Ghodake, G. S., Maile, N. C., Kadam, A. A., Sung Lee, Dae, Fulari, V. J., Shinde, S. K.
Format: Article
Language:English
Subjects:
Capacitance
Cobalt
Energy storage
Nickel
Photoelectron spectroscopy
Powder
Scanning electron microscopy
Spectroscopy
Stainless steel
Sulfide
Transmission electron microscopy
X-rays
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Summary:Abstract In this study, hierarchical interconnected nickel cobalt sulfide (NiCo 2 S 4 ) nanosheets were effectively deposited on a flexible stainless steel foil by the chemical bath deposition method (CBD) for high-performance supercapacitor applications. The resulting NiCo 2 S 4 sample was characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), and electrochemical measurements. XRD and X-ray photoelectron spectroscopy (XPS) results confirmed the formation of the ternary NiCo 2 S 4 sample with a pure cubic phase. FE-SEM and HR-TEM revealed that the entire foil surface was fully covered with the interconnected nanosheets like surface morphology. The NiCo 2 S 4 nanosheets demonstrated impressive electrochemical characteristics with a specific capacitance of 1155 F g −1 at 10 mV s −1 and superior cycling stability (95% capacity after 2000 cycles). These electrochemical characteristics could be attributed to the higher active area and higher conductivity of the sample. The results demonstrated that the interconnected NiCo 2 S 4 nanosheets are promising as electrodes for supercapacitor and energy storage applications.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-10218-z