Fluorinated Zr-MOF-modified separators for Li–S batteries with enhanced electrochemical performance

. These electrochemical properties are all superior to those of the UiO-66-modified separator. The UiO-66-4F-modified separator battery consistently demonstrated better cycling performance and a lower capacity decay rate. These improvements indicate that the electron-withdrawing group -F effectively inhibits the polysulfide shuttle effect and improves Li-S battery performance.