US 12,221,349 B2
Exfoliated graphite and manufacturing method therefor
Hiroji Fukui, Osaka (JP); Akira Nakasuga, Osaka (JP); and Masahiro Toyoda, Oita (JP)
Assigned to SEKISUI CHEMICAL CO., LTD., Osaka (JP); and OITA UNIVERSITY, Oita (JP)
Appl. No. 17/429,744
Filed by SEKISUI CHEMICAL CO., LTD., Osaka (JP); and OITA UNIVERSITY, Oita (JP)
PCT Filed Feb. 26, 2020, PCT No. PCT/JP2020/007576
§ 371(c)(1), (2) Date Aug. 10, 2021,
PCT Pub. No. WO2020/175504, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-035494 (JP), filed on Feb. 28, 2019.
Prior Publication US 2022/0119265 A1, Apr. 21, 2022
Int. Cl. C01B 32/225 (2017.01); C01B 32/205 (2017.01)
CPC C01B 32/225 (2017.08) [C01B 32/205 (2017.08); C01P 2002/82 (2013.01)] 5 Claims
OG exemplary drawing
 
1. Exfoliated graphite being graphene or a laminate of graphene sheets, wherein an aldehyde derivative is chemically bonded to a surface of the exfoliated graphite, and
the exfoliated graphite has
a ratio 2 D/G of 1.0 or more and 2.0 or less, the ratio 2 D/G being a peak area ratio of a 2 D band to a G band in a Raman spectrum measured using Raman spectroscopy, and
a halogen content of 1,000 ppm or less.