Micro-Mesopores Nitrogen-Doped Carbon Combined Polar-MoS2 as Host for High-Performance Li-S Batteries

A composite of MoS2/MMNC (micro-mesopores nitrogen-doped carbon) was prepared through a simple hydrothermal method and utilized as a host for Li-S battery. The crystal structure of MoS2/MMNC-S composite were tested by X-ray diffraction (XRD), Raman Spectroscopy and X-ray photoelectron spectroscopy (XPS). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize its morphology. The pore size distribution and weight ratio of sulfur were measured via N-2 adsorption-desorption isotherm and thermogravimetric analysis (TGA), respectively. MoS2/MMNC-S composite showed a good electrochemical performance as the positive electrode for Li-S battery. The rate performance of the battery is ideal and the capacity retention is maintained at similar to 90% after 200 cycles at 0.5 C.