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

US11817551B2 · kind B2 · utility

Assignee

• QUANTUMSCAPE BATTERY, INC. · US

Inventors

• Cheng-Chieh Chao · San Jose, US
• Lei Cheng · Kunshan, CN
• Christopher Dekmezian · Campbell, US
• Tiffany HO · Fremont, US
• Timothy P. Holme · Mountain View, US
• Tommy HUANG · San Jose, US
• Amal Mehrotra · San Jose, US
• Aram Yang · Berkeley, US

Key dates

• Filing date: Nov 2, 2022
• Grant date: Nov 14, 2023
• Expiry date: Nov 2, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Set forth herein are processes for making lithium-stuffed garnet oxides (e.g., Li7La3Zr2O12, 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.