Ceramic-Polymer Interaction in Solid-State Composite Electrolytes of Lithium Ion Batteries

Based on three dimensional (3D) pervoskite-type Li0.33La0.557TiO3 nanofibers and polymer, a composite solid state electrolyte has been fabricated. Our study shows that the ceramic-polymer interface has significant effect on the ionic conductivity of composite electrolytes and the cyclic performance of symmetric half cells. After a buffer later has been incorporated between the ceramic fibers and polymer matrix, the flexible solid-state electrolyte composite membrane exhibits high ionic conductivity at room temperature, a large electrochemical stability window and good mechanical stability in symmetric Li|electrolyte|Li cell.