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1. (WO2018181402) LITHIUM NICKEL COMPOSITE OXIDE PRODUCTION METHOD

Pub. No.:    WO/2018/181402    International Application No.:    PCT/JP2018/012599
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Mar 28 01:59:59 CEST 2018
IPC: C01G 53/00
H01M 4/36
H01M 4/505
H01M 4/525
Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED
住友化学株式会社
TANAKA CHEMICAL CORPORATION
株式会社田中化学研究所
Inventors: SATO Yuichi
佐藤 雄一
TAKAMORI Kenji
高森 健二
MAEDA Yusuke
前田 裕介
NAKAO Kimiyasu
中尾 公保
KOBAYASHI Ryota
小林 亮太
Title: LITHIUM NICKEL COMPOSITE OXIDE PRODUCTION METHOD
Abstract:
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.