The lithium-sulfur (Li-S) battery is a promising energy storage device in the future. However, its performance is strongly affected by the shuttle effect and inherent sluggish kinetics. Herein, Mo₂C/MoO₃-modified separator is constructed, in which MoO₃ particles are derived by the decomposition of Mo source and simultaneously their surfaces are converted (reduced and carbonized) into Mo₂C, i.e., Mo₂C shell/MoO₃ core. In addition, the resin matrix of the waste CFRP (Carbon fiber reinforced polymer) acts as the carbon source for the change from MoO₃ to Mo₂C, while CF is claimed from CFRP. The synergistic effect of conductive Mo₂C-shell and polar MoO₃-core anchors lithium polysulfide to promote the conversion of sulfur. Benefited from block effect on the soluble lithium polysulfide (LiPS) and catalytic effect on sulfur, Li-S battery with Mo₂C/MoO₃-modified separator owns excellent electrochemical performance: A high initial discharge specific capacity of 1288 mAh g⁻¹ at 0.2C and an initial capacity of 670 mAh g⁻¹ at 4C, as well as the average decay rate per cycle of 0.039% over 250 times.

锂硫（Li-S）电池是未来很有前途的储能装置。然而，它的性能受到穿梭效应和固有的缓慢动力学的强烈影响。在此，构建了Mo ₂ C/MoO ₃改性隔膜，其中MoO ₃颗粒通过Mo源分解衍生，同时其表面转化（还原和碳化）为Mo ₂ C，即Mo ₂ C壳/ MoO ₃核心。_{此外，废CFRP（碳纤维增强聚合物）的树脂基体作为MoO 3}向Mo ₂ C转变的碳源，而CF则从CFRP获得保护。导电钼的协同作用₂ C 壳和极性 MoO ₃核锚定多硫化锂以促进硫的转化。得益于对可溶性多硫化锂 (LiPS) 的阻断效应和对硫的催化作用，采用 Mo ₂ C/MoO ₃改性隔膜的 Li-S 电池具有优异的电化学性能：在初始放电比容量高达 1288 mAh g ^{-1 0.2C 和 670 mAh g -1}在 4C的初始容量，以及每循环 0.039% 的平均衰减率超过 250 次。