Reconfigurable In-S Coordination in SPAN Cathodes: Unlocking High Sulfur Utilization and Fast Kinetics for Practical Li‒S Batteries.

ABSTRACT: Sulfurized polyacrylonitrile (SPAN) has emerged as a promising cathode material for high-energy-density lithium‒sulfur (Li‒S) batteries due to its ability to confine sulfur and suppress polysulfide shuttling. However, conventional SPAN suffers from sluggish conversion kinetics and limited sulfur utilization, especially at high sulfur loadings. In this work, reconfigurable indium‒sulfur (In-S) coordination into SPAN to dynamically regulate sulfur bonding states is introduced. The non-crystalline In-S network reversibly anchors and releases sulfur during cycling, accelerating redox reactions while suppressing phase segregation. Structural analysis reveals atomically dispersed In-S coordination without crystalline inactive phases, achieving an active material content of 47.4 wt.% with only 1.

SUBMITTER: Huang C 

PROVIDER: S-EPMC12561284 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature