US 11,145,892 B2 · Surface-stabilized anode active material particulates for lithium batteries and production method

Abstract

Provided is a surface-stabilized anode active material particulate (for use in a lithium battery), comprising: (a) one or a plurality of prelithiated or un-prelithiated anode active material particles (with or without a coating of carbon, graphene, or ion-conducting polymer); (b) a protecting polymer layer that wraps around, embraces or encapsulates the one or plurality of anode active material particles, wherein the protecting polymer layer has a thickness from 0.5 nm to 5 μm, and a lithium ion conductivity from 10−8 S/cm to 5×10−2 S/cm at room temperature and the protecting polymer layer contains a polymer selected from poly(ethylene oxide) (PEO), polypropylene oxide (PPO), poly(acrylonitrile) (PAN), poly(methyl methacrylate) (PMMA), poly(vinylidene fluoride) (PVdF), poly bis-methoxy ethoxyethoxide-phosphazene, polyvinyl chloride, poly(vinylidene chloride), polydimethylsiloxane, poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP), polyethylene glycol (PEG), a PEG derivative, polyethylene glycol methyl ether, polyethylene glycol dimethyl ether, a sulfonated polymer, or a combination thereof.

Claims34

Dependent claims

A surface-stabilized anode active material particulate for use in a lithium battery, said particulate comprising:

(a) one or a plurality of anode active material particles capable of reversibly storing lithium ions during a charge or discharge of said battery, wherein said anode active material particles are prelithiated to contain an amount of lithium from 1% to 100% of a maximum lithium content contained in said anode active material;
and
(b) a protecting polymer layer that wraps around, embrances or encapsulates said one or plurality of anode active material particles, wherein said protecting polymer layer has a thickness from 0.5 nm to 5 μm, and a lithium ion conductivity from 10−8 S/cm to 5×10−2 S/cm at room temperature.

A surface-stabilized anode active material particulate for use in a lithium battery, said particulate comprising:

(a) one or a plurality of anode active material particles capable of reversibly storing lithium ions during a charge or discharge of said battery, wherein said anode active material particles are coated with a layer of carbon, graphene, electron-conducting polymer, or a combination thereof to form one or a plurality of conductive material-coated particles;
and
(b) a protecting layer that wraps around, embraces or encapsulates said one or plurality of conductive material-coated particles of the anode active material, wherein said protecting layer has a thickness from 0.5 nm to 5 μm, and a lithium ion conductivity from 10−8 S/cm to 5×10−2 S/cm at room temperature.

Dependencies are inferred from the claim text.

Surface-stabilized anode active material particulates for lithium batteries and production method

Life of this patent

Surface-stabilized anode active material particulates for lithium batteries and production method

Life of this patent

Abstract

Claims34