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Lithium‐sulfur (Li‐S) batteries suffer from rapid capacity decay and low energy efficiency because of the low solubility of lithium sulfide (Li2S) in organic solvents and the intrinsic polysulfide shuttle phenomenon. Here, a novel additive, phosphorus pentasulfide (P2S5) in organic electrolyte, is reported to boost the cycling performance of Li‐S batteries. The function of the additive is two‐fold:...
Phosphorous pentasulfide (P2S5) is discovered to be a novel electrolyte additive for high‐energy lithiumsulfur (Li‐S) batteries. P2S5 passivates the surface of metallic lithium anodes, promotes the dissolution of Li2S, blocks the polysulfide shuttle, and thus enables long battery cycle‐life. On page 1064, Chengdu Liang and co‐workers demonstrate that with a theoretical energy density of 2600 Wh/kg,...
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