Quantumscape Corporation

Jon Shan

Rainer Johannes Fasching

Timothy P Holme

Ghyrn E Loveness

Eric Tulsky

Joseph Han

Battery systems using coated conversion materials as the active material in battery cathodes are provided herein. Protective coatings may be an oxide, phosphate, or fluoride, and may be lithiated. The coating may selectively isolate the conversion material from the electrolyte. Methods for fabricating batteries and battery systems with coated conversion material are also provided herein.

Protective coatings for conversion material cathodes

The present invention is directed to processing techniques and systems of metal fluoride based material, including but not limited to nickel difluoride, copper difluoride, manganese fluoride, chromium fluoride, bismuth fluoride, iron trifluoride, iron difluoride, iron oxyfluoride, metal doped iron fluorides, e.g., FeMF(M=metals, which can be Co, Ni, Cu, Cr, Mn, Bi and Ti) materials. An exemplary implementation involves mixing a first compound comprising a metal material, nitrogen, and oxygen to a second compound comprising hydrogen fluoride. The mixed compound is milled to form metal fluoride precursor and a certain byproduct. The byproduct is removed, and the metal fluoride precursor is treated to form iron trifluoride product. There are other embodiments as well.

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San Jose, CA, United States of America

Jon Shan