One-step electrochemical synthesis of MoS2/graphene composite for supercapacitor application
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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.
KeywordsElectrochemical exfoliation Supercapacitors Graphene Exfoliated MoS2 2D materials
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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Conflict of interest
The authors declare that they have no conflict of interest.
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