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, Li1.5Al0.5Ti1.5(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 (Li1.3Al0.3Te0.03Ti1.67(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).