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Eshetu, Gebrekidan Gebresilassie; Judez, Xabier; Li, Chunmei; Bondarchuk, Oleksandr; Rodriguez‐Martinez, Lide M.; Zhang, Heng; Armand, Michel
Angewandte Chemie International Edition, November 27, 2017, Volume: 56, Issue: 48Journal Article
Of the various beyond‐lithium‐ion battery technologies, lithium–sulfur (Li–S) batteries have an appealing theoretical energy density and are being intensely investigated as next‐generation rechargeable lithium‐metal batteries. However, the stability of the lithium‐metal (Li°) anode is among the most urgent challenges that need to be addressed to ensure the long‐term stability of Li–S batteries. Herein, we report lithium azide (LiN3) as a novel electrolyte additive for all‐solid‐state Li–S batteries (ASSLSBs). It results in the formation of a thin, compact and highly conductive passivation layer on the Li° anode, thereby avoiding dendrite formation, and polysulfide shuttling. It greatly enhances the cycling performance, Coulombic and energy efficiencies of ASSLSBs, outperforming the state‐of‐the‐art additive lithium nitrate (LiNO3). The bright azide of life: Lithium azide effectively favors the formation of dendrite‐free and highly ionic conductive solid electrolyte interphases on Li electrodes, and thereby improves the cycling performances and sulfur utilization of Li–S cells.
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