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

• Published in: Journal of solid state electrochemistry 2024-02, Vol.28 (2), p.601-607
• Main Authors: Yan, Qiaohong, Cheng, Xing, Yan, Rentai, Pu, Xingrui, Zhu, Xiaohong
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrochemical impedance spectroscopy; Electrochemistry; Electrolytes; Energy Storage; Interface stability; Lithium batteries; Mass ratios; Molten salt electrolytes; Original Paper; Physical Chemistry; Polyethylene oxide; Solid electrolytes; Solid state
• ISSN: 1432-8488; 1433-0768
• DOI: 10.1007/s10008-023-05712-6

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 Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) powders into polyethylene oxide (PEO)-LiClO 4 at varying mass ratios, a composite electrolyte membrane of approximately 50 μm 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.