Solid-state electrolyte and preparation method and application thereof

Abstract

This invention relates to the field of battery technology, specifically disclosing a solid electrolyte, its preparation method, and its application. The solid electrolyte comprises a core and a nano-organic film coating the surface of the core. The core is lithium aluminum titanium phosphate (LATP), and the nano-organic film is formed by crown ethers. This invention forms a dense nano-organic film on the surface of LATP via crown ethers, creating a chemically stable interface. This interface directly separates LATP from metallic lithium, preventing physical contact between the two and fundamentally inhibiting the degradation of Ti. 4+ The reduction side reaction; the uniformly coated crown ether layer provides uniform Li₂O₃ across the entire LATP surface. + The transmission channel enables Li + The solid electrolyte of this invention has advantages such as high ionic conductivity, wide electrochemical window, and good compatibility with electrode interface, and is suitable for solid-state lithium-ion batteries because the flow is uniformly distributed on the interface.

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