US 12,662,393 B2
Method for producing lithium metal composite oxide
Yuki Matsumoto, Niihama (JP)
Assigned to Sumitomo Metal Mining Co., Ltd., Tokyo (JP)
Appl. No. 18/253,463
Filed by Sumitomo Metal Mining Co., Ltd., Tokyo (JP)
PCT Filed Nov. 19, 2021, PCT No. PCT/JP2021/042621
§ 371(c)(1), (2) Date May 18, 2023,
PCT Pub. No. WO2022/113904, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 2020-194235 (JP), filed on Nov. 24, 2020.
Prior Publication US 2024/0010519 A1, Jan. 11, 2024
Int. Cl. C01G 53/50 (2025.01)
CPC C01G 53/50 (2013.01) 14 Claims
OG exemplary drawing
 
1. A method for producing a lithium metal composite oxide,
wherein, in a calcining step of calcining a substance to be calcined using calcining means, the substance to be calcined is a mixture of a metal composite compound and a lithium compound or a mixture raw material containing a reactant of the metal composite compound and the lithium compound, a content rate of Li in the substance to be calcined is more than 5 mass % and 10 mass % or less,
the calcining means includes an inner wall, a main material of the inner wall is an alloy, and the alloy is one of the following:
(1) an alloy consisting of Ni and Al,
(2) an alloy consisting of Ni, Al, and Si,
(3) an alloy consisting of Ni, Al, and Mn, or
(4) an alloy consisting of Ni, Al, Si, and Mn,
a content rate of the Ni with respect to a total amount of the alloy is 93 mass % or more and 95 mass % or less, and a content rate of the Al with respect to the total amount of the alloy is 3 mass % or more and 5 mass % or less.