Enhanced Specific Capacitance of Few-Layer MoS2 Nanosheets via SDBS-Assisted Hydrothermal Method.
J Nanosci Nanotechnol
; 18(3): 1804-1810, 2018 Mar 01.
Article
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| MEDLINE
| ID: mdl-29448663
ABSTRACT
Few-layer MoS2 nanosheets have been successfully synthesized by a facile anionic surfactantassisted hydrothermal approach. The as-prepared samples are characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It is found that the anionic surfactant sodium dodecylbenzene sulfonate (SDBS) plays a crucial role in the formation of MoS2 nanosheets with few layers and rich exposed edges. The electrochemical performances of the as-prepared samples are evaluated by cyclic voltammogram, galvanostatic charge-discharge and electrochemical impedance spectroscopy. Compared with the pristine MoS2 without SDBS, the MoS2 nanosheets show a high specific capacitance of 223 F g-1 and its capacitance can still maintained a stable specific capacitance of 147 F g-1 after 500 cycles at 1 A g-1. The enhancement in supercapacitors is attributed to few-layer structure and exposed active edges, which enables fast electron transportation between the electrode and electrolytes. Therefore, the MoS2 nanosheets will be a suitable candidate for electrochemical supercapacitor applications.
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MEDLINE
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En
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J Nanosci Nanotechnol
Año:
2018
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Article