Breuer, OrtalOrtalBreuerPeta, GayathriGayathriPetaElias, YuvalYuvalEliasAlon-Yehezkel, HadasHadasAlon-YehezkelWeng, Yu TingYu TingWengFayena-Greenstein, MiryamMiryamFayena-GreensteinNAE-LIH WULevi, Mikhael D.Mikhael D.LeviAurbach, DoronDoronAurbach2023-10-252023-10-252023-01-0100134651https://scholars.lib.ntu.edu.tw/handle/123456789/636497Composite solid electrolytes with ceramic particles dispersed in a polymer matrix are considered a correct choice for all-solid-state batteries. These electrolytes balance the high ionic conductivity of superionic-ceramic conductors and the elasticity of polymers. Here, Li||LiFePO4 batteries with 30 wt% of LATP embedded in PEO20:LiTFSI show superior performance at elevated temperature. After ∼150 cycles, cells retained 84% of their original capacity compared to only 51% for batteries with no additive. At 5 C cells demonstrate 43% higher capacity. In symmetric cells with blocking and non-blocking electrodes and all-solid-state batteries LATP lowers the impedance of the electrode-electrolyte interface ensuring cycling stability. LATP improves performance by stabilization of the cathode-electrolyte interface, apparently the major contributor to the cell impedance.[SDGs]SDG7journal article10.1149/1945-7111/acf4822-s2.0-85172912437https://api.elsevier.com/content/abstract/scopus_id/85172912437