Preparation of free-standing Li₃InCl₆ solid electrolytes film with infiltration-method enable roll-to-roll manufacture

All-solid-state Li batteries (ASSLBs) have attracted more and more attention due to their potential energy density and safety benefits. For practical application, searching for a preparation method of solid-state electrolyte that is compatible with mature Li-ion-batteries technologies and enable scale-up production is important. In this work, an infiltration method is proposed for the preparation of Li₃InCl₆/glass-fiber solid composite electrolyte (LIC-SCE) film. Roll pressing method is adopted to obtain compact LIC-SCE with good mechanical strength, showing great promising to roll-to-roll manufacture platform. The LIC-SCE shows a high ionic conductivity of 5.4×10⁻⁴ S cm⁻¹ at room temperature. Further, ASSLBs are successfully assembled with LiCoO₂ (LCO) cathode.