Regulating a NaF-Rich SEI Layer for Dendrite-Free Sodium Metal Batteries Using Trifunctional Halogenated Covalent Organic Framework Separators.

ABSTRACT: Uncontrolled sodium-ion (Na⁺) transport, fragile solid electrolyte interphase (SEI) layers, in and sluggish Na⁺ desolvation using conventional separators drive dendrite growth, posing critical challenges to the development of sodium metal batteries (SMBs). Porous materials with tunable Na⁺ transport pathways offer promise; however, simultaneously enhancing Na⁺ kinetics, promoting NaF-rich SEI formation, and lowering desolvation energy barriers remains a critical challenge. Herein, a trifunctional halogenated covalent organic framework (COF) integrated into a polypropylene (PP) separator (COF-F@PP) is designed to address these issues. The COF-F@PP separator features positively charged sites to anchor PF₆ ^- anions and facilita

SUBMITTER: Ali M 

PROVIDER: S-EPMC12499483 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature