QuantumScape Corporation
LITHIUM-STUFFED GARNET THIN FILMS AND PELLETS HAVING AN OXYFLUORINATED AND/OR FLUORINATED SURFACE AND METHODS OF MAKING AND USING THE THIN FILMS AND PELLETS

Abstract:

Set forth herein are processes for making lithium-stuffed garnet oxides (e.g., Li.sub.7La.sub.3Zr.sub.2O.sub.12, also known as LLZO) that have passivated surfaces comprising a fluorinate and/or an oxyfluorinate species. These surfaces resist the formation of oxides, carbonates, hydroxides, peroxides, and organics that spontaneously form on LLZO surfaces under ambient conditions. Also set forth herein are new materials made by these processes.