Lithium–sulfur (Li–S) battery as a high-energy density electrochemical energy storage system has attracted many researchers’ attention. However, the shuttle effect of Li–S batteries and the challenges associated with lithium metal anode caused poor cycle performance. In this work, the organosulfide poly(sulfur-1,3-diisopropenylbenzene) (PSD) was prepared as cathode material and additive of P(VDF-HFP) polymer electrolyte (P(VDF-HFP)). It was verified that P(VDF-HFP) polymer electrolyte with 10% PSD (P(VDF-HFP)-10%PSD) showed a higher ionic conductivities than that of liquid electrolyte up to 2.27 × 10⁻³ S cm⁻¹ at room temperature. The quasi-solid-state Li−S batteries fabricated with organosulfide cathode material PSD and P(VDF-HFP) based functional polymer electrolyte delivered good cycling stability (780 mAh g⁻¹ after 200th cycle at 0.1 C) and rate performance (613 mAh g⁻¹ at 1 C). The good cycling performance could be attributed to the synergistic effect of components, including the interaction between polysulfides and polymer main chain in the organosulfide cathode, the sustained organic/inorganic hybrid stable SEI layer formed by polymer electrolyte additive PSD, the improved cathode/electrolyte interface and the good affinity between P(VDF-HFP) based functional polymer electrolyte and Li metal surface. This strategy herein may provide a new route to fabricate high-performance Li–S batteries through the organosulfide cathode and functional polymer electrolyte.

锂硫（Li–S）电池作为高能量密度电化学储能系统吸引了许多研究人员的注意。但是，锂锂电池的穿梭效应以及锂金属阳极带来的挑战导致了较差的循环性能。在这项工作中，制备了有机硫化物聚（硫-1,3-二异丙烯基苯）（PSD）作为正极材料和P（VDF-HFP）聚合物电解质（P（VDF-HFP））的添加剂。证实了在PSD浓度为2.27×10 ^-3  S cm ^-1时，具有10％PSD的P（VDF-HFP）聚合物电解质（P（VDF-HFP）-10％PSD）的离子电导率高于液体电解质。在室温下。由有机硫化物阴极材料PSD和P（VDF-HFP）基功能聚合物电解质制成的准固态Li-S电池具有良好的循环稳定性（0.1 C下200次循环后为780 mAh g ^-1）和速率性能（613 mAh） g ^-1在1 C）。良好的循环性能可归因于各组分的协同效应，包括有机硫化物阴极中多硫化物与聚合物主链之间的相互作用，由聚合物电解质添加剂PSD形成的持续的有机/无机杂化稳定SEI层，改进的阴极/电解质界面P（VDF-HFP）基功能高分子电解质与锂金属表面之间的亲和性良好。本文中的这一策略可能为通过有机硫化物阴极和功能聚合物电解质制造高性能Li-S电池提供一条新途径。