A comparative study on the electrochemical capacitor performance of 1T/2H hybridized phase and 2H pure phase of MoS2 nanoflowers

Abstract

The 1T/2H hybridized and 2H pure phases of MoS2 nanoflowers were synthesized in a one-step hydrothermal process with the molybdenum source as sodium molybdate dihydrate and the sulfur source as thiourea. The as-prepared 1T/2H hybridized and 2H pure phases of MoS2 were investigated using a thermogravimetry\\differential thermal analysis, powder x-ray diffraction, field emission scanning electron microscopy, and energy-dispersive x-ray spectroscopy. The obtained 1T/2H hybridized phases of MoS2 were confirmed by the Raman spectroscopy. The electrochemical characteristics of MoS2 electrodes were examined using cycle voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. The electrodes are based on the 1T/2H hybridized phases MoS2 with specific capacitance (C p) of 555.4 F g−1 at current densities (C d) of 0.5 A g−1, capacity retention ratio of 85% after 10 000 cycles were observed that could be a strong potential electrode material for supercapacitors application.