A Catalytic Electrolyte Additive Modulating Molecular Orbital Energy Levels of Lithium Polysulfides for High-Performance Lithium–Sulfur Batteries

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

“…Beyond regulating the cathode material, electrolyte additives have also been proven effective in lowering the activation potential of Li 2 S in recent years. − For example, redox mediators help electrons or Li + cross the solid–liquid interface of the Li 2 S/electrolyte in a chemical way instead of via the electrochemical pathway, which has very sluggish kinetics. , As for lithium salt additives or organic co-solvents, the activation potential is greatly reduced due to the promoted Li + conductivity. , Compared with regulating the structure of Li 2 S itself, introducing electrolyte additives seems to be more facile and practical, so the use of electrolyte additives as a strategy to lower the activation potential is attracting attention. From this point of view, we reviewed the research progress on the use of electrolyte additives to reduce the activation potential of Li 2 S in recent years (Figure ).…”