US 12,113,196 B2
Method of manufacturing positive electrode active material for lithium ion secondary battery, positive electrode active material for lithium ion secondary battery, and lithium ion secondary battery
Shuhei Oda, Ehime (JP)
Assigned to SUMITOMO METAL MINING CO., LTD., Tokyo (JP); and Panasonic Energy Co., Ltd., Osaka (JP)
Appl. No. 17/310,688
Filed by SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
PCT Filed Feb. 18, 2020, PCT No. PCT/JP2020/006361
§ 371(c)(1), (2) Date Aug. 18, 2021,
PCT Pub. No. WO2020/171089, PCT Pub. Date Aug. 27, 2020.
Claims priority of application No. 2019-029866 (JP), filed on Feb. 21, 2019.
Prior Publication US 2022/0102696 A1, Mar. 31, 2022
Int. Cl. H01M 4/04 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/0471 (2013.01) [H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 2004/028 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of manufacturing a positive electrode active material for a lithium ion secondary battery comprising:
a water-washing step of washing a lithium-nickel composite oxide containing lithium (Li), nickel (Ni), and an element M, (wherein, the element M is at least one element selected from Mn, V, Mg, Mo, Nb, Ti, Co, and Al) with water, and conducting a filtration to form a washed cake;
a filling step of filling the washed cake which is a material to be dried and a tungsten compound without lithium into a dryer; and
a drying step of drying the material to be dried by the dryer while the material to be dried is caused to flow,
wherein the filling step includes a time period in which the washed cake and the tungsten compound without lithium are supplied to the dryer at the same time.