Porphyrin-based covalent organic framework/graphene composite separator synergistically enhances the adsorption and catalysis of lithium polysulfides

We prepared a COF/graphene composite material to enhance the performance of commercial Celgard separators in lithium–sulfur batteries. The modified separator enabled the lithium–sulfur battery to achieve a discharge capacity of 1048 mAh g −1 at 0.1C.