	US 11,742,475 B2
	Encapsulated anode active material particles, lithium secondary batteries containing same, and method of manufacturing
Aruna Zhamu, Springboro, OH (US); and Bor Z. Jang, Centerville, OH (US)
Assigned to Global Graphene Group, Inc., Dayton, OH (US)
Filed by Nanotek Instruments Inc., Dayton, OH (US)
Filed on Apr. 3, 2017, as Appl. No. 15/478,125.
Prior Publication US 2018/0287142 A1, Oct. 4, 2018
Int. Cl. H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 4/38 (2006.01); H01M 4/02 (2006.01); H01M 10/052 (2010.01)

CPC H01M 4/366 (2013.01) [H01M 4/386 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 4/626 (2013.01); H01M 10/052 (2013.01); H01M 2004/027 (2013.01)]

46 Claims

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