Unveiling cathode catalysis of fluorinated electrolyte additives for high-performance Na-Cl₂ batteries.

ABSTRACT: Rechargeable sodium-chlorine (Na-Cl₂) batteries offer a promising solution for next-generation energy storage, due to their high electrochemical performance and reliance on abundant, cost-effective materials. The electrolyte typically comprises a mixture of aluminum chloride (AlCl₃) and thionyl chloride (SOCl₂), with the addition of sodium bis(fluorosulfonyl)imide (NaFSI) and sodium trifluoromethanesulfonimide (NaTFSI) as F-containing additives. These additives have been considered to form a fluorinated solid-electrolyte interphase layer on the Na metal anode to enhance cycling stability, a mechanism analogous to those observed in conventional alkali metal batteries. Here we reveal a previously unrecognized spontaneous reaction between these additives and A

SUBMITTER: Xu Q 

PROVIDER: S-EPMC12491998 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature