Lowered Activation Potential of Lithium Sulfide Cathode Material Aided by Electrolyte Additive

High activation potential and poor electronic/ionic conductivity greatly hinder the practical application of Li2S as the cathode material in lithium-ion sulfur batteries. Introducing electrolyte additives is one of the most promising strategies to address these challenges. Appropriate electrolyte additives not only lower the activation potential of Li2S but also promote the rate capability and cycling performance. In this Perspective, recent research progress on using electrolyte additives to reduce the activation potential of Li2S is reviewed, and future possibilities are proposed.