Solution‐Based Processing of Graphene–Li2S Composite Cathodes for Lithium‐Ion and Lithium–Sulfur Batteries

Nanostructured Li2S and graphene–Li2S composite cathodes are prepared via a versatile solution-based method. Graphene improves the cathode conductivity, rate, and cycling performance of Li2S. Higher electrolyte molarity enhances cycle stability of the cathodes owing to reduced polysulfide dissolution and maintaining better mechanical properties of a PVDF binder.