Preparation and Electrochemical Performance of Molybdenum Disulfide Nanosheets for Supercapacitor

Abstract

Abstract: Nanosheet molybdenum disulfide (MoS₂) electrode materials for supercapacitor were prepared by high-temperature solid-phase method combined with ball milling using sodium molybdate and thiourea in a Mo to S molar ratio of 1:15 as raw materials. The thermal stability, phase structure and microstructure were characterized by thermogravimetric-differential scanning calorimetry, X-ray diffraction and scanning electron microscopy. The eletrochemical properties of the samples were tested by cyclic voltammetry (CV), galvanostatic charge/discharge cycling (GCD) and electrochemical impedance spectroscopy (EIS). The results show that the number of MoS₂ layers prepared by sintering at 750 ℃ and ball milling at 700 r·min^-1 for 10 h is 88. The specific capacitances of the samples are 82.4 and 60.9 F·g^-1 at the current density of 0.5 and 1 A·g^-1, respectively (better than 54.6 and 24.0 F·g^-1 before ball milling). After 2 000 cycles, the specific capacitance retention rate is 92%.

Key words: molybdenum disulfide, high-temperature solid-phase method, supercapacitor, electrochemical performance, specific capacitance, ball milling

CLC Number:

ZHANG Rui, WANG Youqi, SHEN Peizhi. Preparation and Electrochemical Performance of Molybdenum Disulfide Nanosheets for Supercapacitor[J]. Journal of Synthetic Crystals, 2023, 52(4): 663-670.

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