▎ 摘　　要

Lithium-sulfur (Li-S) batteries are deliberated as capable candidate in next generation of rechargeable batteries. It offers a significant specific capacity of 1675 mAh/g and high-energy density (2600 Wh/kg). In this work, sulfur/MnO2/graphene oxide (GO) composite has been prepared by incorporating sulfur in different ratios with MnO2 and GO (10:20 and 20:10; SMG1 and SMG2) by solid state reaction and used as cathode for Li-S battery. The obtained composites have been characterized for physical and electrochemical performances. The XRD spectrum display the sulfur is in orthorhombic structure and the presence of carbon has been confirmed by Raman analysis. The SMG2 composite with 70 wt% of sulfur displays a considerably embellished cycling performance (1610 mAh/g at an initial cycle at 0.1 C). The capacity and stability of the material is achieved by suppressing the polysulfides effectively. Low capacity fade, accommodation of volume change arising during cycling processes makes this positive electrode material competent for Li-S battery application.