US 12,334,558 B2
Carbon material, method for producing carbon material, and non-aqueous secondary battery using carbon material
Shunsuke Yamada, Inashiki-gun (JP); Nobuyuki Ishiwatari, Inashiki-gun (JP); Satoshi Akasaka, Inashiki-gun (JP); Daigo Nagayama, Inashiki-gun (JP); Shingo Morokuma, Inashiki-gun (JP); Koichi Nishio, Inashiki-gun (JP); Iwao Soga, Inashiki-gun (JP); Hideaki Tanaka, Inashiki-gun (JP); Takashi Kameda, Sakaide (JP); Tooru Fuse, Sakaide (JP); and Hiromitsu Ikeda, Sakaide (JP)
Assigned to MITSUBISHI CHEMICAL CORPORATION, Chiyoda-ku (JP)
Filed by MITSUBISHI CHEMICAL CORPORATION, Chiyoda-ku (JP)
Filed on Dec. 30, 2021, as Appl. No. 17/565,914.
Application 17/565,914 is a continuation of application No. 15/399,423, filed on Jan. 5, 2017, granted, now 11,936,044.
Application 15/399,423 is a continuation of application No. PCT/JP2015/069574, filed on Jul. 7, 2015.
Claims priority of application No. 2014-139782 (JP), filed on Jul. 7, 2014; application No. 2014-234606 (JP), filed on Nov. 19, 2014; application No. 2014-248251 (JP), filed on Dec. 8, 2014; application No. 2015-064897 (JP), filed on Mar. 26, 2015; application No. 2015-067180 (JP), filed on Mar. 27, 2015; application No. 2015-067184 (JP), filed on Mar. 27, 2015; application No. 2015-067194 (JP), filed on Mar. 27, 2015; application No. 2015-067201 (JP), filed on Mar. 27, 2015; application No. 2015-122197 (JP), filed on Jun. 17, 2015; and application No. 2015-122198 (JP), filed on Jun. 17, 2015.
Prior Publication US 2022/0123309 A1, Apr. 21, 2022
Int. Cl. H01M 4/583 (2010.01); C01B 32/21 (2017.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/587 (2013.01) [C01B 32/21 (2017.08); H01M 4/583 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); C01P 2004/32 (2013.01); C01P 2006/14 (2013.01); C01P 2006/16 (2013.01); H01M 2004/021 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A carbon material, comprising granulated particles made of a carbonaceous material and satisfying (2L):

OG Complex Work Unit Math
wherein X is a volume-based average particle diameter determined by laser diffraction, and X1 is an equivalent circular diameter as determined from a cross-sectional SEM image,
provided that the cross-sectional SEM image is a reflected electron image acquired at an acceleration voltage of 10 kV,
wherein the carbon material has an average box-counting dimension relative to void regions of 30 particles of 1.55 or greater, as calculated from images obtained by randomly selecting 30 granulated particles from a cross-sectional SEM image of the carbon material, dividing the cross-sectional SEM image of each granulated particle into void regions and non-void regions, and binarizing the image.