Revisiting the Impact of Anion Selection on Sulfur Redox Reaction Kinetics for High Sulfur Loading Lithium-Sulfur Batteries.

ABSTRACT: Lithium bis(trifluoromethane)sulfonimide (LiTFSI) is widely used in lithium-sulfur (Li-S) battery electrolytes due to its stability with lithium polysulfides (LiPSs) and moderate compatibility with lithium metal anodes. However, LiTFSI presents environmental concerns due to its association with per- and polyfluoroalkyl substances (PFAS), which are environmentally persistent and potentially toxic, raises sustainability concerns. This research also reveals that LiTFSI limits sulfur redox reactions (SRRs), making it less effective than other lithium salts. Additionally, some salts previously considered incompatible with Li-S systems due to their reactivity with LiPSs are demonstrated to perform effectively. For the first time, a protective, porous cathode electrolyte interphase (CEI) formed i

SUBMITTER: Fei Y 

PROVIDER: S-EPMC12506606 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature