Insights Into the Interfacial Degradation of High-Voltage All-Solid-State Lithium Batteries.

ABSTRACT: Poly(ethylene oxide) (PEO)-based solid polymer electrolyte (SPE) is considered as a promising solid-state electrolyte for all-solid-state lithium batteries (ASSLBs). Nevertheless, the poor interfacial stability with high-voltage cathode materials (e.g., LiCoO₂) restricts its application in high energy density solid-state batteries. Herein, high-voltage stable Li₃AlF₆ protective layer is coated on the surface of LiCoO₂ particle to improve the performance and investigate the failure mechanism of PEO-based ASSLBs. The phase transition unveils that chemical redox reaction occurs between the highly reactive LiCoO₂ surface and PEO-based SPE, resulting in structure collapse of LiCoO₂, hence the poor cycle performance of PEO-based A

SUBMITTER: Li J 

PROVIDER: S-EPMC9485319 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature