US 12,107,250 B2
Method for producing electrode active material for non-aqueous secondary battery
Takefumi Sumitomo, Anan (JP); Zenji Okabayashi, Tokushima (JP); Mari Yamamoto, Naruto (JP); Hiroaki Takahashi, Yokohama (JP); and Akihiro Tokai, Yokohama (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Appl. No. 17/310,389
Filed by NICHIA CORPORATION, Anan (JP)
PCT Filed Jan. 30, 2020, PCT No. PCT/JP2020/003512
§ 371(c)(1), (2) Date Jul. 30, 2021,
PCT Pub. No. WO2020/158887, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-017327 (JP), filed on Feb. 1, 2019.
Prior Publication US 2022/0102695 A1, Mar. 31, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/04 (2006.01); H01M 4/525 (2010.01)
CPC H01M 4/0416 (2013.01) [H01M 4/366 (2013.01); H01M 4/525 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for producing an electrode active material for
a non-aqueous secondary battery, the method comprising:
contacting a dispersion containing graphene and a dispersion medium with alkali-metal-transition-metal composite oxide particles,
wherein the dispersion has a dispersibility index that is 0.45 or more and a dispersion stability index that is 0.1 or more, and
wherein the alkali-metal-transition-metal composite oxide particles have a ratio of 50% particle diameter D50 in a volume-based cumulative particle size distribution to an average particle diameter DSEM based on electron microscopy, or D50/DSEM, in a range of from 1 to 6.