Nitrogen-Doped Graphene Uniformly Loaded with Large Interlayer Spacing MoS Nanoflowers for Enhanced Lithium-Sulfur Battery Performance.

Lithium-sulfur (Li-S) batteries offer a high theoretical energy density but suffer from poor cycling stability and polysulfide shuttling, which limits their practical application. To address these challenges, we developed a PANI-modified MoS-NG composite, where MoS nanoflowers were uniformly grown on graphene oxide (GO) through PANI modification, resulting in an increased interlayer spacing of MoS. This expanded spacing exposed more active sites, enhancing polysulfide adsorption and catalytic conversion. The composite was used to prepare MoS-NG/PP separators for Li-S batteries, which achieved a high specific capacity of 714 mAh g at a 3 C rate and maintained a low capacity decay rate of 0.085% per cycle after 500 cycles at 0.5 C. The larger MoS interlayer spacing was key to improving redox reaction kinetics and suppressing the shuttle effect, making the MoS-NG composite a promising material for enhancing the performance and stability of Li-S batteries.