An ameliorated interface between PEO electrolyte and Li anode by Li1.3Al0.3Ti1.7(PO4)3 nanoparticles

Due to their higher safety, stability and energy density, all-solid-state batteries will be promising candidates for the next generation of lithium battery systems. The acquisition of high-performance solid-state electrolytes is pivotal in the actualization of all-solid-state batteries. By uniformly dispersing nanoscale Li1.3Al0.3Ti1.7(PO4)(3) (LATP) powders into polyethylene oxide (PEO)-LiClO4 at varying mass ratios, a composite electrolyte membrane of approximately 50 mu m thickness was prepared using the casting method. Subsequent characterization of these materials, accomplished through X-ray diffraction, scanning electron microscopy, electrochemical impedance spectroscopy, and cyclic charge-discharge tests, unveiled intriguing findings. Although the beneficial effect of LATP on the conductivity of PEO is somewhat limited, it demonstrates a capability to reduce the interface impedance between polyethylene oxide and lithium metal, thereby enhancing interface stability. This research provides constructive insights and prompts for designing composite electrolytes for future all-solid-state batteries.