Protective coatings for conversion material cathodes
AssigneeQuantumScape Corporation
InventorsRainer Fasching, Joseph Han, Jon Shan, Ghyrn E. Loveness, Eric Tulsky, Timothy Holme
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Abstract
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.
Claims23
An energy storage device comprising
- a. an anode,
- b. an electrolyte, and
- c. a cathode comprising
- a plurality of coated electrochemically active material particles, each particle comprising
- a core comprising conversion material, and
- the coating,
- wherein the coating selectively isolates the conversion material from the electrolyte, and
- wherein the capacity of the active material is greater than about 300 mAh/g.
An energy storage device comprising
- a. an anode,
- b. an electrolyte, and
- c. a cathode comprising
- an ion conductor,
- a current collector,
- electrochemically active conversion material, and
- a coating,
- wherein the coating selectively isolates the electrochemically active material from the electrolyte, and
- wherein the capacity of the active conversion material is greater than about 300 mAh/g.
A method of preparing an electrochemically active material component of a cathode in an energy storage device, the method comprising:
- a. providing electrochemically active material particles, each particle comprising a core comprising conversion material, and
- b. depositing a coating on each particle,
- wherein the coating is partially lithiated.
Dependencies are inferred from the claim text.