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|1. (WO2018181402) LITHIUM NICKEL COMPOSITE OXIDE PRODUCTION METHOD|
|Applicants:||SUMITOMO CHEMICAL COMPANY, LIMITED
TANAKA CHEMICAL CORPORATION
|Title:||LITHIUM NICKEL COMPOSITE OXIDE PRODUCTION METHOD|
This lithium composite metal oxide production method is for producing a lithium nickel composite oxide represented by general formula (I), and has: a mixing step for mixing a lithium compound with a nickel-containing metal composite compound to obtain a mixture; a firing step for firing the mixture to obtain a fired product; and a post-treatment step including a washing step for washing the fired product, wherein the mixing step includes a step for performing mixing such that the molar ratio (Li/Me) of lithium contained in the lithium compound to metal elements in the nickel-containing metal composite compound exceeds one, and performing a treatment such that the total amount of residual sulfate radicals and residual lithium carbonate in the lithium nickel composite oxide obtained after the post-treatment step is to be 0.3 mass% or less, and the sodium content of the lithium nickel composite oxide obtained after the post-treatment step is to be 50 ppm or less.