Amorphous MoS2/MoO3 nanosheets as high‐efficient polysulfide barrier in Li‐S batteries

Abstract Lithium‐sulfur batteries (LSBs) are seriously impeded by poor reaction kinetics and the polysulfides shuttling, leading to low utilization of sulfur and poor cycling performance. Herein, amorphous MoS 2 /MoO 3 nanosheets are prepared by a one‐step formamide (FA)‐assisted strategy. Due to the merits of high adsorption capability and good catalytic activity of MoS 2 , relatively high electronic conductivity and strong polarity of MoO 3 , and abundant active sites of amorphous nanosheet structure, the LSBs based on amorphous MoS 2 /MoO 3 ‐2 nanosheets coated separator exhibit an outstanding specific capacity (1420.2 mA h g −1 at 0.1 C), excellent rate capacity (505.4 mA h g −1 at 5 C), and long cycle life (a negligible decay rate of 0.063 % per cycle at 0.5 C). This work provides an idea for designing efficient amorphous catalytic materials in LSBs.