期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 771, 期 -, 页码 803-809出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.08.203
关键词
MoS2 nanosheets; Ball milling; Supercapacitor; Organic electrolyte; Energy density
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Korea government (MSIT) [2016R1A2B2013831, 2018R1A4A1025998]
Electrochemical energy storage devices based on the two-dimensional metal chalcogenides have great interest due to their intriguing physical and chemical properties. In this work, we are reporting the high-performance supercapacitive properties of few-layered MoS2 (prepared via ball milling process) in an organic electrolyte. The physico-chemical characterizations such as X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscope, and laser Raman spectrum, confirms the formation of few-layered MoS2. The cyclic voltammetry and electrochemical impedance spectroscopy (Nyquist and Bode plots) studies of the MoS2 symmetric supercapacitor (SSC) reveals the presence of pseudocapacitive nature of charge-storage via ion-intercalation/de-intercalation process. The galvanostatic charge-discharge analysis shows that the MoS2 SSC device possesses a high specific capacitance of 14.75 F g(-1) and an energy density of 18.43 Wh kg(-1) (measured at a constant current density of 0.75 A g(-1)) with excellent cyclic stability over 5000 cycles. The experimental results suggest that the few-layered MoS2 SSC device might be the ideal choice in the development of next-generation energy devices. (C) 2018 Elsevier B.V. All rights reserved.
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