Functionalized triazine-based covalent organic frameworks containing quinoline via aza-Diels-Alder reaction for enhanced lithium-sulfur batteries performance

•Triazine-based COFs were functionalized quinoline via aza-Diels-Alder reaction.•Functional COFs with sulfur storage were used as electrode materials in Li-S battery.•Enhanced battery performances were ascribed to quinoline and triazine of COFs.