US 9,812,712 B2
Highly dispersible graphene composition, preparation method thereof, and electrode for lithium ion secondary battery containing highly dispersible graphene composition
Peiyu Sun, Shanghai (CN); Zhenqi Wu, Shanghai (CN); Gangqiao Liu, Shanghai (CN); Gang Wu, Shanghai (CN); Eiichiro Tamaki, Shiga (JP); and Yasuo Kubota, Shiga (JP)
Assigned to TORAY INDUSTRIES, INC., Tokyo (JP)
Appl. No. 14/430,267
Filed by Toray Industries, Inc., Chuo-ku, Tokyo (JP)
PCT Filed Sep. 22, 2013, PCT No. PCT/CN2013/083920
§ 371(c)(1), (2) Date Mar. 23, 2015,
PCT Pub. No. WO2014/044210, PCT Pub. Date Mar. 27, 2014.
Claims priority of application No. 2012 1 0359340 (CN), filed on Sep. 24, 2012.
Prior Publication US 2015/0249250 A1, Sep. 3, 2015
Int. Cl. H01B 1/04 (2006.01); C01B 31/02 (2006.01); H01M 4/96 (2006.01); B82Y 30/00 (2011.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); C01B 31/04 (2006.01); H01M 4/58 (2010.01)
CPC H01M 4/625 (2013.01) [C01B 31/043 (2013.01); C01B 31/0438 (2013.01); H01M 4/5825 (2013.01); H01M 4/623 (2013.01); H01M 10/0525 (2013.01); C01B 2204/04 (2013.01); C01B 2204/32 (2013.01)] 6 Claims
 
1. A graphene composition containing graphene, thiourea and elemental sulfur, the element ratio of sulfur to carbon measured in X-ray photoelectron spectroscopy measurement being 0.04 or more and 0.12 or less and the elemental sulfur content in the graphene composition is 0.01 or more and 0.1 or less relative to the carbon component, wherein the thiourea is adsorbed on the surface of the graphene.