METHOD FOR PREPARING SECONDARY BATTERY MATERIAL FROM BLACK MASS

WIPO Patent Application WO/2023/191414

A1

Embodiments of the present disclosure relate to a method for preparing a secondary battery material from black mass.　The method for preparing a secondary battery material from black mass, according to one embodiment, comprises: a firing step of firing black mass; a pre-extraction step of dissolving, in water, the black mass fired in the firing step, thereby separating same into a lithium solution and a cake; a first evaporation concentration step of evaporating and concentrating the lithium solution produced in the pre-extraction step, thereby preparing a lithium carbonate crystal; a leaching step of leaching the cake separated out in the pre-extraction step; a first purification step of removing copper and aluminum from the leaching solution produced by means of the leaching step; a post-extraction step of neutralizing the solution obtained from the first purification step, thereby separating same into a lithium solution and a cake (NCM cake) comprising Ni, Co and Mn; and a transfer step of transferring, to a lithium hydroxide preparation step, the lithium carbonate crystal produced by means of the first evaporation concentration step and the lithium solution separated out by means of the post-extraction step.

JPH08500465	PROBLEM TO BE SOLVED: To process a sodium-sulfur storage battery
WO/2000/051915	WASTE CELL RECOVERY MEANS

CHOI CHANG YOUNG (KR)
LEE JE JOONG (KR)

PCT/KR2023/004018

October 05, 2023

March 27, 2023

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KOREA ZINC CO LTD (KR)
KEMCO (KR)

H01M10/54; C01D15/02; C01G45/00; C01G53/00

KR20200139692A	2020-12-14
KR101773439B1	2017-09-01
JP2021172537A	2021-11-01
KR20200117950A	2020-10-14
JP2014156648A	2014-08-28
KR102493104B1	2023-01-31

CHANG, Duck Soon et al. (KR)

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