5Nitrogen doped mesoporous carbon (NMC) with high specific surface area, large pore volume and stable nitrogen content has been prepared by in-situ doping through one step carbonization to immobilize sulfur for lithium-sulfur batteries. The structure and composition of the prepared NMC and NMC@S composites are confirmed with nitrogen sorption, elemental analysis, X-ray photoelectron spectroscopy (XPS), X-ray diffraction patterns (XRD), high resolution transmission electron microscopy (HR-TEM) 10 and thermogrgravimetric analysis (TGA). Scanning electron microscopy (SEM) images show a homogeneous distribution of sulfur within NMC@S. In comparison with free doped mesoporous carbon (MC), the NMC@S with high sulfur content (65%) is found to exhibit a higher initial discharge capacity of 1012 mAh g -1 and capacity retention. The electrochemical performance of Li-S batteries is improved by the nitrogen doping, which not only enhances the electric conductivity but also further confine 15 polysufides to the mesoporous carbon from shuttle effect.

not Available.