US 12,406,984 B2
Silicon-based anode material, preparation method therefor and use thereof in lithium-ion battery
Zhiqiang Deng, Guangdong (CN); Chunlei Pang, Guangdong (CN); Jianguo Ren, Guangdong (CN); and Youyuan Huang, Guangdong (CN)
Assigned to BTR NEW MATERIAL GROUP CO., LTD., Shenzhen (CN); and DINGYUAN NEW ENERGY TECHNOLOGY CO., LTD., Huizhou (CN)
Filed by BTR NEW MATERIAL GROUP CO., LTD., Guangdong (CN); and Dingyuan New Energy Technology Co., LTD., Guangdong (CN)
Filed on Oct. 21, 2022, as Appl. No. 18/048,812.
Application 18/048,812 is a continuation in part of application No. 16/760,579, granted, now 11,515,530, previously published as PCT/CN2018/118102, filed on Nov. 29, 2018.
Claims priority of application No. 201711321650.6 (CN), filed on Dec. 12, 2017.
Prior Publication US 2023/0106786 A1, Apr. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/386 (2013.01) [H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 10/0525 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A silicon-based anode material, comprising a silicon-based active material and a composite layer coated on the surface of the silicon-based active material, wherein the composite layer comprises a flexible polymer and a conductive material, wherein, the conductive material comprises flake graphite and a nano-carbon based material, wherein the flake graphite is integrally attached to the surface of the silicon-based active material, and the nano-carbon based material fills the region on the surface of the silicon-based active material that is not attached by the flake graphite, and wherein, a contact angle of the silicon-based anode material is ≤60°, wherein the contact angle is tested by the Washburn method.
 
2. A silicon-based anode material, comprising a silicon-based active material, a conductive material and a flexible polymer, wherein the conductive material and the flexible polymer coat on the surface of the silicon-based active material, and wherein the conductive material comprises flake graphite and a nano-carbon based material, wherein the flake graphite is integrally attached to the surface of the silicon-based active material, and the nano-carbon based material fills the region on the surface of the silicon-based active material that is not attached by the flake graphite, and wherein, a contact angle of the silicon-based anode material is ≤60°, wherein the contact angle is tested by the Washburn method.
 
3. A silicon-based anode material, comprising a silicon-based active material, a conductive material and a flexible polymer, wherein the conductive material comprises flake graphite and a nano-carbon based material;
the surface of the silicon-based active material attaches with the flake graphite and the nano-carbon based material;
the flexible polymer is bonded between the flake graphite and the nano-carbon based material and/or the flexible polymer is coated on the surface of the flake graphite,
wherein the flake graphite is integrally attached to the surface of the silicon-based active material, and the nano-carbon based material fills the region on the surface of the silicon-based active material that is not attached by the flake graphite, and
wherein, a contact angle of the silicon-based anode material is ≤60°, wherein the contact angle is tested by the Washburn method.