The oxygen doped MoS₂ nanosheets were in-situ grown into the three-dimensional (3D) porous graphene frameworks (O-MoS₂/G) through a facile hydrothermal method, and then used to coat the commercial PP separators for Li-S batteries. The relatively low hydrothermal temperature should be a key factor for achieving the O-doped MoS₂. The O dopants could expand and disturb interlayer structures of MoS₂ to produce abundant active edge sites for adsorption and catalytic conversion of polysulfides. Moreover, the basal planes of MoS₂ should be also activated by the O doping and exhibit enhanced chemical adsorption strength towards polysulfides for propelling electrochemical conversion. Owing to the synergistic effects of the 3D porous graphene frameworks and the inlaid O-MoS₂ nanosheets, the Li-S cells with high S areal loading cathodes and O-MoS₂/G@PP separators exhibit excellent electrochemical performances with a high specific capacity of 1141 mAh g⁻¹ at the 1st cycle at 0.1 C, reversible capacities of 772 mAh g⁻¹ at the 50th cycle at 0.2 C and 583 mAh g⁻¹ at the 100th cycle at 0.5 C. These encouraging results provide that the heteroatom doping should be a promising approach to improve the adsorption and catalytic activity of MoS₂ for propelling the polysulfide conversion in Li-S batteries.

通过简便的水热法将氧掺杂的 MoS ₂纳米片原位生长成三维 (3D) 多孔石墨烯框架 (O-MoS ₂ /G)，然后用于涂覆锂硫电池的商用 PP 隔膜. 相对较低的水热温度应该是实现 O 掺杂 MoS ₂的关键因素。O掺杂剂可以扩展和扰乱MoS ₂的层间结构，从而产生丰富的活性边缘位点，用于多硫化物的吸附和催化转化。_{此外，MoS 2}的基面还应该被 O 掺杂激活，并对多硫化物表现出增强的化学吸附强度，以推动电化学转化。由于 3D 多孔石墨烯框架和镶嵌的 O-MoS ₂纳米片的协同效应，具有高 S 面积负载阴极和 O-MoS ₂ /G@PP 隔膜的 Li-S 电池表现出优异的电化学性能和高比容量在 0.1 C 下第一个循环时的可逆容量为 1141 mAh g ^-1 ，在 0.2 C 下第 50 个循环时的可逆容量为 772 mAh g ^{-1和在 0.5 C 下第 100 个循环时的可逆容量为 583 mAh g -1}。这些令人鼓舞的结果表明杂原子掺杂应该是提高 MoS2 吸附和催化活性的有前途的方法₂用于推动Li-S电池中的多硫化物转化。