Advancing lithium-sulfur battery technology: Research on doped ZnO modified membranes

In lithium -sulfur batteries(LSB), the diaphragm is a crucial component that provides channels for lithium ion transport and prevents internal short circuits. However, commercial diaphragms such as polyethylene and polypropylene and their composites need better thermal stability, low mechanical strength, and limited electrolyte wettability. They are prone to shrinking and puncturing at high temperatures, leading to severe consequences. To address this issue, aramid nanofiber (ANF) was modified, and a novel membrane was prepared using the sol-gel method. When the current density is 0.1 C, the initial discharge capacity of the battery is 960 mg - 1, compared with 835 mg- 1 for the PP film. After 100 cycles, the battery maintains a specific capacity of 575 mg - 1, with a decay rate of 0.4 % per cycle and a coulomb efficiency of 99.7 %.