Quantumscape Battery, Inc.

Tiffany Ho

Aram Yang

Timothy P Holme

Rainer Johannes Fasching

Zhebo Chen

Mohit Singh

Lei Cheng

Cheng-Chieh Chao

Will Hudson

Amal Mehrotra

Tommy Huang

Christopher Dekmezian

Greg Roberts

Tim Holme

Larry Beck

Thomas Arnold

Set forth herein are processes for making and using electrolytes (also known as catholytes when the electrolytes are mixed with cathode active materials) for a positive electrode of an electrochemical cell. The catholytes include additives that prevent surface fluorination of lithium-stuffed garnet solid-state separators in contact with the positive electrode. Also set forth herein are electrochemical devices which include the catholytes in addition to a lithium-stuffed garnet solid-state electrolyte separator.

Electrochemical cells with catholyte additives and lithium-stuffed garnet separators

Provided herein are electrochemical cells having a solid separator, a lithium metal anode, and a positive electrode catholyte wherein the electrochemical cell includes a nitrile, dinitrile, or organic sulfur-including solvent and a lithium salt dissolved therein. Also set forth are methods of making and using these electrochemical cells.

Catholytes for solid state rechargeable batteries, battery architectures suitable for use with these catholytes, and methods of making and using the same

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

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

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Fremont, CA, United States of America

Tiffany Ho