A bidirectional interfacial engineering strategy for highly stable sodium metal batteries.

ABSTRACT: Sodium (Na) metal batteries (SMBs) are regarded as some of the most promising next-generation energy storage systems due to their high energy density. However, their practical application is severely hindered by interfacial instabilities at both the anode and cathode, which result in rapid capacity degradation during cycling. Here, we proposed a bidirectional interfacial regulation strategy that simultaneously stabilizes both electrode interfaces. We found that the additive sulfolane features highly polar sulfone groups, effectively tailors the Na⁺ solvation structure and mitigates excessive anion decomposition under high-voltage conditions at the cathode. Concurrently, another additive fluoroethylene carbonate preferentially decomposes at the Na metal anode to form a dense, NaF

SUBMITTER: Yang X 

PROVIDER: S-EPMC12406151 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature