Polarization of lithium-sulfur (Li-S) batteries consumes energy density upon cycling, which precludes their practical application in state-of-the-art devices. Herein a conformal zinc sulfide/reduced graphene oxide/elemental sulfur (ZnS/rGO/S) composite is synthesized and used as cathode materials in Li-S batteries. The synergetic regulation of ohmic, concentration, and electrochemical polarization decreases the overpotential and improves the cycling performance of the Li||ZnS/rGO/S cell. Combining theoretical calculations and experimental results, it is revealed that the ZnS spheres can absorb lithium polysulfide (LPS) intermediates, catalyze LPS conversion, and provide fast electronic/ionic diffusion kinetics. The ZnS/rGO/S cathode is further applied in pouch Li-S cells, demonstrating the practicability of sulfur cathodes with reduced polarization.

锂硫（Li-S）电池的极化会在循环时消耗能量密度，这使其无法在最先进的设备中实际使用。本文合成了共形硫化锌/还原氧化石墨烯/元素硫（ZnS / rGO / S）复合材料，并将其用作Li-S电池的正极材料。欧姆，浓度和电化学极化的协同调节减少了过电势并改善了Li || ZnS / rGO / S电池的循环性能。结合理论计算和实验结果，发现ZnS球体可以吸收多硫化锂（LPS）中间体，催化LPS转化，并提供快速的电子/离子扩散动力学。ZnS / rGO / S阴极进一步应用于袋装Li-S电池，