Patent ID: 11949101
Assignee: TANAKA CHEMICAL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 10:
11. A method for manufacturing a lithium composite metal compound represented by Composition Formula (I), the method comprising:

Li[Lix(Ni(1-y-z)CoyMnz)1-x]O2  (I)

where M represents one or more elements selected from the group consisting of Mn, Fe, Cu, Ti, Mg, Al, W, B, Mo, Zn, Sn, Zr, Ga, Nb, and V, and −0.10≤x≤0.2, 0<y≤0.2, 0≤z≤0.2, and 0<y+z≤0.25 are satisfied,
a step of calcining a mixture of a lithium compound and a transition metal compound to obtain a lithium composite metal compound;
a water washing step of removing the lithium compound remaining in the lithium composite metal compound by water washing; and
a step of drying the water-washed lithium composite metal compound,
wherein the drying step is performed in a rotary kiln supplied with a gas having a carbon dioxide concentration of 300 ppm or less, the water-washed lithium composite metal compound is heated at a temperature of 150° C. or higher and 300° C. or lower in the rotary kiln, and a ratio (B/A) of an aeration rate B (Nm3/hour) of a gas that is supplied from an outside to a moisture evaporation rate A (kg/hour) during drying is 2 Nm3/kg or more and 20 Nm3/kg or less, and
wherein, the aeration rate B is the aeration rate of the gas with a carbon dioxide concentration of 300 ppm or less.