Electrospun composite polymer electrolyte for high-performance quasi solid-state lithium metal batteries.

Lithium-ion conducting solid electrolytes has been playing a vital role in designing solid-state lithium batteries to provide a propitious solution for the upcoming generation of energy storage devices that need to store more energy with a high degree of safety. Among different lithium-ion conductors, Li_1.5Al_0.5Ti_1.5(PO₄)₃, a NASICON-type ceramic, has received attraction due to its good air stability and high lithium-ion conductivity. Herein, tellurium incorporated lithium aluminum titanium phosphate (Li_1.3Al_0.3Te_0.03Ti_1.67(PO₄)₃) (LATTP) has been prepared by solid-state reaction method. Further, the various amounts of LATTP incorporated electro-spun composite polymer electrolytes are prepared by using poly(vinylidenefluoride-hexafluoropropylene) (PVdF-HFP) polymer. Herein, we observed that 8 wt% of LATTP incorporated PVdF-HFP composite polymer electrolyte (CPE-8) exhibited high ionic conductivity of 1.9 × 10⁻³ S cm⁻¹ at 30 °C, and enhanced lithium dendrite suppression and relatively lesser interfacial stability issues. Remarkably, LATTP incorporated CPE-8 shows improved cycling performance over 200 cycles compared to LATTP free (CPE-0). [ABSTRACT FROM AUTHOR]