Effect of soluble sulfur species on the electrochemical behavior of lithium-sulfur batteries with dual-phase electrolytes

Lithium polysulfides (Li2Sn, 2 < n <= 8) are investigated as a catholyte for lithium-sulfur (Li-S) batteries with dual-phase electrolytes. The combined electrochemical and morphological investigation reveals that the cell with Li2Sn shows higher electrochemical activity and faster reaction kinetics compared to that with S-8, providing an attractive alternative for high energy density rechargeable flow batteries.