Encapsulated anode active material particles, lithium secondary batteries containing same, and method of manufacturing

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United States of America Patent

PATENT NO 11742475
APP PUB NO 20180287142A1
SERIAL NO

15478125

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Abstract

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Provided is particulate of an anode active material for a lithium battery, comprising one or a plurality of anode active material particles being embraced or encapsulated by a thin layer of a high-elasticity polymer having a recoverable tensile strain no less than 5%, a lithium ion conductivity no less than 10−6 S/cm at room temperature, and a thickness from 0.5 nm to 10 μm, wherein the polymer contains an ultrahigh molecular weight (UHMW) polymer having a molecular weight from 0.5×106 to 9×106 grams/mole. The UHMW polymer is preferably selected from polyacrylonitrile, polyethylene oxide, polypropylene oxide, polyethylene glycol, polyvinyl alcohol, polyacrylamide, poly(methyl methacrylate), poly(methyl ether acrylate), a copolymer thereof, a sulfonated derivative thereof, a chemical derivative thereof, or a combination thereof.

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Patent Owner(s)

  • GLOBAL GRAPHENE GROUP, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jang, Bor Z Centerville, US 667 14552
Zhamu, Aruna Springboro, US 525 11602

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