Molybdenum Disulfide Carbon Composite Material Using Hydrothermal Method as Electrode Material for Supercapacitors

Abstract

MoS2 has excellent properties and carbon-like structure, valuable for supercapacitor research. Low conductivity limits its use. Carbon has high conductivity and stability. Combining them improves electrochemical performance and cycling stability. In this paper, Molybdenum disulfide-carbon (MoS2/C) composites with different solvents as well as different carbon contents were prepared by a simple one-step hydrothermal method. In the first step, the effect of different solvent conditions on the MoS2/C composites was firstly explored, in which deionized water and anhydrous ethanol were selected as solvents respectively to ensure that other conditions remained unchanged, and it was found that the MoS2/C composites had a large specific surface area when deionized water was used as the solvent, which indicated that they possessed good electrochemical properties. In the second step, the effect of carbon content on MoS2/C composites was investigated. Different glucose additions were chosen as the only variables, and it was found that the electrochemical properties of MoS2/C composites gradually increased with the growth of carbon content, but began to decrease again when the carbon content grew to a certain level. After continuous experiments, the results of electrochemical tests showed that the specific capacitance reached 202.6 F/g with the best electrochemical performance when the glucose sugar content was 0.28 mmol.

Keywords: MoS2/C composites, supercapacitors, electrode materials