Poly(vinylidene difluoride-co-hexafluoropropylene) (PVDF-HFP)/ Al-doped Li7La3Zr2O12 (Al-LLZO) composite polymer electrolyte for solid state lithium ion batteries | Poster Board #465

Composite polymer electrolytes (CPEs) have garnered significant attention in the realm of solid-state lithium-ion batteries (SSLIBs) due to their potential to overcome limitations associated with traditional liquid electrolytes, such as safety concerns and limited electrochemical stability. Synthesis and characterization of CPEs incorporating lithium lanthanum zirconium oxide (LLZO), poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), and poly(ethylene oxide) (PEO). LLZO, a promising solid-state electrolyte material, provides high ionic conductivity and chemical stability, while PVDF-HFP contribute to mechanical flexibility and improved interfacial compatibility. PEO is added to decrease the crystallinity of PVDF-HFP increasing the ionic conductivity of the polymer. Electrospun PVDF-HFP and PEO nano fibers were spun containing LLZO. A LLZO slurry was add to the nano fibers to optimize LLZO concentration of the CPE. The electrochemical performance of resulting CPE membranes is evaluated through impedance spectroscopy, cyclic voltammetry, and galvanostatic charge-discharge cycling. The synergistic effects of LLZO, PVDF-HFP, and PEO within the CPE structure led to enhanced lithium-ion transport properties, mechanical strength, and thermal stability of the CPE.