Work

Fluoroisatin Mediation Unlocks Durable Lithium–Sulfur Batteries Via Self‐Regulating Solvation Engineering and SEI Reinforcement

Year: 2025

Type: article

Abstract: ABSTRACT Lithium–sulfur (Li–S) batteries face significant commercialization hurdles, predominantly due to challenges in promoting sulfur conversion reactions and simultaneously stabilizing cathode/electrolyte/anode interfaces. To tackle these issues, Fluoroisatin (FRN), as an electrolyte additive, was introduced in Li–S batteries, which dissolves in the electrolyte, undergoes partial deprotonation, and reacts with LiTFSI/lithium polysulfides. Consequently, it can regulate sulfur conversion pathways, accelerate reaction kinetics, and construct a LiF‐rich solid‐state electrolyte interface. The Li–S battery, with merely 0.5 wt% FRN additive and operating at −20°C, shows a high initial discharge capacity of 912 mAh g −1 at 0.2 C, and it is maintained at 830 mAh g −1 after 120 cycles. The potential of FRN, as a versatile electrolyte modifier, has potential for using in high‐performance Li–S batteries.

Source: Carbon Neutralization

DOI: 10.1002/cnl2.70078