A New Concept of a Porous Carbon Interlayer Impregnated with Sulfur for Long‐Life and High‐Energy Li?S Batteries

摘要

We present a new interlayer concept for the realization of high‐energy‐density Li?S batteries. Disordered mesoporous carbons replicated by silica nanoparticles were partially filled with sulfur via a melt‐diffusion method. Sulfur‐impregnated disordered mesoporous carbon (DMC‐S) composites were used as an interlayer between a cathode and anode to provide additional active materials for a Li?S cell. The Li?S cell with the DMC‐S interlayer exhibited an approximately two‐fold increase in areal capacity compared with the control cell without an interlayer. DMC‐S composites offer the unique advantage of acting as a porous framework to accommodate active materials and suppress polysulfide diffusion. We propose that this new approach provides a viable path for the development of Li?S batteries with a high‐energy density and excellent cycling stability.