MoS2–C/graphite, an electric energy storage device using Na+-based organic electrolytes

Abstract

Molybdenum disulfide–carbon composite (MoS₂–C) sample has been prepared by a hydrothermal method using Na₂MoO₄, CH₄N₂S and glucose as starting materials and then calcined at 800 °C in an N₂/H₂ mixed atmosphere. X-ray diffraction and N₂ adsorption–desorption tests have been employed to characterize its crystal and pore structure. SEM, TEM and TG methods have been used to investigate its morphology and the weight ratio of carbon. The MoS₂–C can be used as the negative electrode for electric energy storage devices using Na⁺-based organic electrolytes. The charge storage mechanism at the MoS₂–C negative electrode has been investigated. Electric energy storage devices using MoS₂–C/graphite have been constructed and their electrochemical performance has been studied.