Conductive MOF Modified Separator for Mitigating the Shuttle Effect of Lithium-Sulfur Battery through a Filtration Method.

Although there are plenty of merits for lithium-sulfur (Li-S) batteries, its undesired shuttle effect and its insulated nature are hindering the practical applications. Here, a conductive metal-organic framework (MOF) modified separator has been designed and fabricated through a facile filtration method to address the issues. Specifically, its intrinsic microporous structure, hydrophilic polar property and conductive feature could make it easy to contact with and trap polysulfides and boost the kinetics of electrochemical reactions. Both the physical and chemical properties of the as-prepared separator are beneficial to alleviate the shuttle effect and enhance the rate capability. Accordingly, the electrochemical performance of the battery with MOF modified separator was significantly improved.