US 12,444,744 B2
Electrochemically stable anode particulates for lithium secondary batteries
Bor Z. Jang, Centerville, OH (US)
Assigned to Honeycomb Battery Company, Dayton, OH (US)
Filed by Nanotek Instruments, Inc., Dayton, OH (US)
Filed on Jan. 2, 2019, as Appl. No. 16/238,052.
Application 16/238,052 is a continuation in part of application No. 16/160,257, filed on Oct. 15, 2018.
Prior Publication US 2020/0119353 A1, Apr. 16, 2020
Int. Cl. H01M 4/583 (2010.01); H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/583 (2013.01) [H01M 4/366 (2013.01); H01M 4/5825 (2013.01); H01M 4/622 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An anode electrode for a lithium battery, said anode electrode comprising multiple particulates of an anode active material, wherein at least a particulate comprises a core and a thin encapsulating layer encapsulating said core, wherein said core comprises a plurality of porous primary particles of said anode active material having a pore volume Vpp and a solid volume Va, an electron-conducting material as a non-porous matrix, binder or filler material occupying 50% by weight of said particulate weight, and additional pores having a pore volume Vp, wherein said additional pores are between the porous primary particles and the thin encapsulating layer, wherein said additional pores are not part of the porous primary particles, wherein said core does not contain a carbon foam or porous carbon matrix, and said thin encapsulating layer comprises an electrically conducting material and has a thickness from 1 nm to 10 μm, an electric conductivity from 10−6 S/cm to 20,000 S/cm and a lithium ion conductivity from 10−8 S/cm to 5×10−2 S/cm and wherein the particulate has a volume ratio Vp/Va of 10/1.0 or a total pore-to-solid ratio (Vp+Vpp)/Va of 20/1.0, and said plurality of primary particles are themselves porous having a free space in a form of surface pores and/or internal pores to expand into without straining said thin encapsulating layer when said lithium battery is charged, wherein said electron-conducting material contains a carbonaceous or graphitic material selected from a carbon nanofiber, nanocarbon particle, metal nanoparticle, metal nanowire, electron-conducting polymer, graphene, or a combination thereof, wherein said graphene is selected from graphene chloride, nitrogenated graphene, hydrogenated graphene, or a combination thereof and said graphene comprise single-layer graphene or few-layer graphene, wherein said few-layer graphene is defined as a graphene platelet formed of less than 10 graphene planes.