	US 12,281,016 B2
	Conductive composite material of graphene, preparation method therefor, use thereof and lithium-ion battery
Sai Sun, Shanghai (CN); Siyu Zhang, Shanghai (CN); Wenqian Dong, Shanghai (CN); and Huanxin Gao, Shanghai (CN)
Assigned to CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECHNOLOGY, SINOPEC, Shanghai (CN)
Appl. No. 18/246,866
Filed by CHINA PETROLEUM & CHEMICAL CORPORATION, Beijing (CN); and SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECHNOLOGY, SINOPEC, Shanghai (CN)
PCT Filed Sep. 27, 2021, PCT No. PCT/CN2021/120911 § 371(c)(1), (2) Date Mar. 28, 2023, PCT Pub. No. WO2022/063292, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 202011042741.8 (CN), filed on Sep. 28, 2020; and application No. 202110438129.0 (CN), filed on Apr. 22, 2021.
Prior Publication US 2023/0357019 A1, Nov. 9, 2023
Int. Cl. C01B 32/194 (2017.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)

CPC C01B 32/194 (2017.08) [H01M 4/625 (2013.01); H01M 10/0525 (2013.01); C01B 2204/04 (2013.01); C01B 2204/22 (2013.01); C01B 2204/32 (2013.01); C01P 2002/82 (2013.01); C01P 2004/03 (2013.01); C01P 2004/24 (2013.01)]

18 Claims

1. A conductive composite material of graphene, comprising graphene nano-sheets and a conjugated copolymer, wherein the conjugated copolymer comprises alkynyl groups, has a linear structure, and is grafted to the graphene nano-sheets,

wherein the graphene nano-sheets are low-layer graphene comprising 3-5 layers of graphene,

wherein the graphene nano-sheets involve in their Raman spectrum a D peak and a G peak which have the peak heights of Ip and IG, respectively, whereinwhere I_D/I_Gis 0.03-0.30, and

wherein the conductive composite material of graphene has a conductivity of 200-800 S/cm.