Dual Roles of Deep Eutectic Solvent in Polysulfide Redox and Catalysis for Intermediate-Temperature Potassium-Sulfur Batteries.

ABSTRACT: Potassium-sulfur (K-S) batteries hold great promise for long-duration energy storage due to their low cost and high energy density. However, the irreversible deposition of K₂S₂/K₂S severely hinders sulfur utilization and cycling stability. Herein, a NiS-DES interfacial regulation strategy is developed that leverages the dual functionality of a deep eutectic solvent (DES) to govern the adsorption and conversion behavior of K₂S₂/K₂S at the catalytic interface, enabling their highly reversible transformation. Specifically, DES forms moderate electronic coupling with NiS to weaken the excessively strong adsorption of K₂S and prevent catalyst deactivation. Simultaneously, strong electronic interactions between DES and

SUBMITTER: Tian L 

PROVIDER: S-EPMC12506609 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature