Electrochemical performance of mixed-phase 1T/2H MoS2 synthesized by conventional hydrothermal v/s microwave-assisted hydrothermal method for supercapacitor applications

Mixed-phase 1T/2H MoS2 has been receiving immense attention as an electrode material for super -capacitors due to the synergistic effects of both the phases. Herein, we synthesized mixed-phase 1T/2H MoS2 via two different techniques: conventional hydrothermal (HT) and microwave-assisted hydrothermal (MHT) technique. The formation of MoS2 is confirmed through X-ray diffraction pattern, scanning electron microscopy, energy dispersive X-ray spectroscopy, Raman-spectra, and X-ray photoelectron spectra. The electrochemical performance of the two samples is investigated using cyclic voltammetry (CV), Gravimetric charging-discharging (GCD) and electrochemical impedance spectroscopy (EIS). MoS2 synthesized via MHT method (MS-MW) and HT method (MS-HT) deliver capacitances of 421 F g(-1) and 742 F g(-1) at 5 mV s(-1), respectively. The energy density of MS-HT (57 Wh kg(-1)) is almost double than that of MS-MW (30 Wh kg(-1)). MS-HT also exhibited remarkable capacitance retention of 91% over 1200 cycles, compared with MS-MW. The results demonstrate that MoS2 synthesized by the hydrothermal method delivers superior electro-chemical performance. (C) 2022 Elsevier B.V. All rights reserved.

Automated summary

Mixed-phase 1T/2H MoS2 has been synthesized via conventional hydrothermal (HT) and microwave-assisted hydrothermal (MHT) techniques, and their electrochemical performances were compared. The results show that MoS2 synthesized by the hydrothermal method exhibits superior electrochemical performance, including higher capacitance and higher capacitance retention.