US 11,658,303 B2
Conductive material dispersion, binder resin-containing conductive material dispersion, slurry for electrode film, electrode film, and non-aqueous electrolyte secondary battery
Honami Hirabayashi, Tokyo (JP)
Assigned to TOYO INK SC HOLDINGS CO., LTD., Tokyo (JP); and TOYOCOLOR CO., LTD., Tokyo (JP)
Filed by TOYO INK SC HOLDINGS CO., LTD., Tokyo (JP); and TOYOCOLOR CO., LTD., Tokyo (JP)
Filed on Feb. 21, 2022, as Appl. No. 17/676,795.
Application 17/676,795 is a continuation of application No. PCT/JP2021/032213, filed on Sep. 2, 2021.
Claims priority of application No. JP2020-148208 (JP), filed on Sep. 3, 2020.
Prior Publication US 2022/0181636 A1, Jun. 9, 2022
Int. Cl. H01M 4/62 (2006.01); H01M 4/525 (2010.01); H01M 4/505 (2010.01); H01M 4/04 (2006.01); H01M 4/1391 (2010.01); H01M 10/0525 (2010.01); C01B 32/174 (2017.01)
CPC H01M 4/625 (2013.01) [C01B 32/174 (2017.08); H01M 4/0416 (2013.01); H01M 4/1391 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/623 (2013.01); H01M 10/0525 (2013.01); C01B 2202/22 (2013.01)] 14 Claims
 
1. A conductive material dispersion containing a conductive material containing carbon fibers, a dispersant, and a dispersion medium, wherein
the dispersant contains a copolymer A containing a nitrile group-containing structural unit and an aliphatic hydrocarbon structural unit, and a Mooney viscosity (ML1+4, 100° C.) of the copolymer A is 40 to 70, and
a phase angle of the conductive material dispersion at a frequency of 1 Hz obtained by dynamic viscoelasticity measurement is 19° or greater.