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TeslaPatent applicationBatteries & energyInterest 4/10

Tesla patents coating for battery binder particles to block ions

Tesla describes a method for making battery electrodes where small binder particles are wrapped in a thin, ion-blocking coating. This coating prevents the binder from reacting with the battery's electrolyte, potentially improving the battery's stability and performance.

Why it mattersIt is a specific manufacturing tweak that could help make electric vehicle batteries more durable or efficient over time.

In the filing’s own words

Passivation methods and compositions for electrode binders are disclosed. A coated binder particle for use in an electrode film of an energy storage device is provided. The coated binder particle can comprise a coating over the surface of a binder particle, wherein the coating provides ionic insulation to the binder particle. In some embodiments, the coating covers the entire surface of the binder particle. In still further embodiments, a coated binder particle in an energy storage device blocks ionic contact between the binder and an electrolyte.

What exactly they claim (claim 1)

1. A method for fabricating an electrode film, comprising: mixing binder particles and an ionically insulating coating material to form coated binder particles, wherein the total mass of the ionically insulating coating material is about 1-50% the total mass of the binder particles; combining the coated binder particles with active material particles to form a first mixture; milling at least some of the first mixture to form an electrode film mixture; and calendering the electrode film mixture to form a self-supporting electrode film.

Facts

Company
Tesla (Tesla, Inc.)
Official title
COMPOSITIONS AND METHODS FOR PASSIVATION OF ELECTRODE BINDERS
Publication number
US20260290832A1
Application number
19692998
Filed
May 29, 2026
Published
Sep 24, 2026
Inventors
1
Claims
26

Classified under

H01M 4/623 Electricity & electronicsH01M 4/133 Electricity & electronicsH01M 4/139 Electricity & electronicsH01M 4/1393 Electricity & electronicsH01M 4/625 Electricity & electronicsH01M 10/0525 Electricity & electronics
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.