Solid state lithium metal batteries are considered to be the most potential energy storage device to re-place traditional lithium ion batteries due to their high energy density and safety.Ionic liquid modified porous materials have gradually become a hot topic in the field of solid electrolytes owing to their nanointerface compati-bility and high ionic conductivity.This work employs the lithification treatment on Na-13X molecular sieve filled with lithium ion liquid to form the Li-IL@Li-13X.Li-13X with rich Lewis acid sites can immobilize TFSI anions in ionic liquids,and its skeleton structure can serve as ion transport channels,increasing the amount of freely migrating lithium ions.The Li-IL@Li-13X-base composite solid electrolyte was obtained upon an adding of Li-IL@Li-13X into UV-polymer adhesive by a UV curing technology.The composite solid electrolyte was stably plated and peeled at a current density of 0.1 mA·cm-2 at 45℃for 1 400 hours,demonstrating its excellent ability to inhibit lithium dendrites.In addition,the composite solid electrolyte was solidified on the positive electrode using an in-situ process,which optimizes the solid-solid contact interface problem and achieves a capacity retention rate of 91.3%after 400 cycles.The integration of molecular sieve and ionic liquid as a conductor material by in-situ UV curing technology provides a new idea for fabricating solid-state electrolytes.
molecular sievelithificationin situ curing13X based composite solid electrolyte
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