Abstract
In this study, an MoS2/graphene composite is fabricated from bulk MoS2 and graphite rod via a facile electrochemical exfoliation method. The as-prepared samples are characterized by X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy and ultraviolet-visible spectroscopy techniques to confirm the formation of the MoS2/graphene composite. The electrochemical behavior of the MoS2/graphene composite is evaluated through cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. It exhibits high specific capacitance of 227 F g−1 as compared with the exfoliated graphene (85 F g−1) and exfoliated MoS2 (70 F g−1) at a current density of 0.1 A g−1. This can be attributed to the synergistic effect between graphene and MoS2. Moreover, it displays high electrochemical stability and low electrical resistance.
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Acknowledgments
The authors would like to acknowledge the funding from the Ministry of Education Malaysia in the form of FRGS [RDU1901186: FRGS/1/2019/STG07/UMP/02/6] and Universiti Malaysia Pahang grant RDU170357. Moreover, the authors extend their appreciation to King Khalid University, the Ministry of Education–Kingdom of Saudi Arabia for supporting this research through a grant (RCAMS/KKU/002-18) under the Research Center for Advanced Material Science. In addition, Dr. Gomaa A. M. Ali would like to express his thanks to SESAME Synchrotron (Allan, Jordan), which through the EU-funded project OPEN SESAME provided training on material characterization testing and data analysis.
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Highlights
• An MoS2/graphene composite is obtained via one-step electrochemical exfoliation.
• The MoS2/graphene composite is employed as electrode material for supercapacitor application.
• MoS2/graphene shows high specific capacitance of 227 F g−1 (threefold > MoS2 and graphene).
• MoS2/graphene shows high electrochemical stability and low electrical resistance.
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Ali, G.A.M., Thalji, M.R., Soh, W.C. et al. One-step electrochemical synthesis of MoS2/graphene composite for supercapacitor application. J Solid State Electrochem 24, 25–34 (2020). https://doi.org/10.1007/s10008-019-04449-5
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DOI: https://doi.org/10.1007/s10008-019-04449-5