Compositions and methods for passivation of electrode binders
AssigneeTesla, Inc.
InventorMohammed-Yazid Saidi
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Abstract
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.
Claims26
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.
A method for fabricating an electrode film, comprising:
- mixing binder particles and an ionically insulating coating material to form coated binder particles, wherein a thickness of the ionically insulating coating material coated on the binder particles is about 0.1-100 microns;
- 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.
A method for fabricating an electrode film, comprising:
- mixing binder particles and an ionically insulating coating material to form coated binder particles, wherein mixing coats at least about 70% of an average surface of the binder particles with the ionically insulating coating material;
- 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.
Dependencies are inferred from the claim text.