Lithium-sulfur batteries (LSBs) have been developed as next-generation power sources owing to their high theoretical capacities and energy densities, cost effectiveness, and abundance. However, the low electrical conductivity of sulfur in the cathode and the dissolution of lithium polysulfides (LiPS) into the liquid electrolyte are challenging issues that deteriorate both capacity and energy density. Herein, a porous vanadium nitride and reduced graphene oxide (VN/rGO) composite is prepared as an LSB interlayer that enhances conversion and redox reactions and increases sulfur utilization. Polar VN in the VN/rGO interlayer chemically adsorbs LiPS while rGO provides excellent electrical conduction and a high specific surface area for the physical adsorption of LiPS. The dual LiPS adsorption effect of VN/rGO suppresses shuttle effect and enhances electrochemical performance, leading to specific capacities of 1025 and 693 mAh g^-1 at 0.5 and 2 C, respectively, and a retention of 81% at 0.5 C after 200 cycles.

锂硫电池 (LSB) 因其高理论容量和能量密度、成本效益和丰富性而被开发为下一代电源。然而，正极中硫的低电导率和多硫化锂 (LiPS) 溶解到液体电解质中是具有挑战性的问题，会降低容量和能量密度。在此，制备了多孔氮化钒和还原氧化石墨烯 (VN/rGO) 复合材料作为 LSB 夹层，可增强转化和氧化还原反应并提高硫的利用率。VN/rGO 夹层中的极性 VN 化学吸附 LiPS，而 rGO 为 LiPS 的物理吸附提供出色的导电性和高比表面积。在 0.5 和 2 C 下分别为^-1 ，在 200 次循环后在 0.5 C 下的保留率为 81% 。