ACTIVE MATERIAL REUSE METHOD USING CATHODE SCRAPS

Title:

ACTIVE MATERIAL REUSE METHOD USING CATHODE SCRAPS

Document Type and Number:

WIPO Patent Application WO/2022/080657

Kind Code:

A1

Abstract:

A method for recovering an active material from cathode scraps and reusing same is provided. A cathode active material reuse method of the present invention comprises the steps of: (a-1) dry grinding cathode scraps, which comprise a cathode active material layer of a lithium composite transition metal oxide on a current collector, so as to desorb the active material layer in the form of a powder, and thus separate same from the current collector; (a-2) heat treating, in air, the active material layer having been desorbed in the form of a powder, so as to thermally decompose a binder and a conductive material contained in the active material layer, and thus recover an active material; (b) washing the recovered active material with an aqueous solution of a lithium compound, which is basic in an aqueous solution state, and drying same; and (c) adding a lithium precursor to the washed active material and annealing same to obtain a reusable active material.

Inventors:

KIM MIN-SEO (KR)
PARK SE-HO (KR)
YANG DOO-KYUNG (KR)

Application Number:

PCT/KR2021/011629

Publication Date:

April 21, 2022

Filing Date:

August 30, 2021

Export Citation:

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Assignee:

LG ENERGY SOLUTION LTD (KR)

International Classes:

H01M10/54; C01G53/00; C22B7/00; H01M4/02; H01M4/131

Foreign References:

KR20000019850A	2000-04-15
KR20180100414A	2018-09-10
KR20180071106A	2018-06-27
KR101049937B1	2011-07-15
KR101191154B1	2012-10-15
KR20200134325A	2020-12-01

Other References: