Li₂ZrF₆ protective layer enabled high-voltage LiCoO₂ positive electrode in sulfide all-solid-state batteries.

ABSTRACT: The application of high-voltage positive electrode materials in sulfide all-solid-state lithium batteries is hindered by the limited oxidation potential of sulfide-based solid-state electrolytes (SSEs). Consequently, surface coating on positive electrode materials is widely applied to alleviate detrimental interfacial reactions. However, most coating layers also react with sulfide-based SSEs, generating electronic conductors and causing gradual interface degradation and capacity fading. To address this, we propose a Li₂ZrF₆ coating layer on LiCoO₂, which exhibits minimal reaction with SSEs, and its decomposition products are electron-conductive-free. Furthermore, this coating layer also efficiently mitigates the layered-to-spinel/rock-salt surface structura

SUBMITTER: Zhou X 

PROVIDER: S-EPMC11696131 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature