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Abstract
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Solid state inorganic ceramic electrolytes have garnered considerable attention for the development of all solid-state batteries (ASSBs) due to their high safety, thermal stability, and energy density. Despite extensive studies on the physio-electrochemical characteristics of these solid electrolytes, it is essential to evaluate their stability against organic solvents and binders for successful large-scale commercialization. In this study, we optimized the large-scale synthesis of SnCl2 doped Li7P2S8I (LTPSIC) solid electrolyte using a high energy ball milling process. The LTPSIC solid electrolyte, treated with various polar and non-polar organic solvents and polymeric binders, demonstrated ionic conductivity comparable to that of the untreated LTPSIC solid electrolyte. Moreover, the treated LTPSIC solid electrolytes-maintained stability with a lithium metal anode and showed a critical current density nearly identical to that of the untreated LTPSIC solid electrolyte. Finally, we assembled an all-solid-state lithium battery (ASSB) using the treated LTPSIC solid electrolyte sheet and studied its galvanostatic charge–discharge characteristics. The resulting ASSB displayed an initial specific capacity of 153.3 mAh g−1 with a coulombic efficiency of 72.3 % at a 0.1C-rate. The present work enables the large-scale fabrication of LTPSIC solid electrolytes with high ionic conductivity and stability against organic solvents and polymeric binders. This advancement allows slurry-based processing, a critical step toward roll-to-roll manufacturing of ASSBs. |
