Title:
REUSE METHOD OF ACTIVE MATERIAL OF POSITIVE ELECTRODE SCRAP
Document Type and Number:
WIPO Patent Application WO/2023/014023
Kind Code:
A1
Abstract:
Provided is a method for recovering and reusing an active material from a positive electrode scrap. The method for reusing a positive electrode active material of the present invention comprises the steps of: heat-treating a positive electrode scrap comprising a lithium composite transition metal oxide positive electrode active material layer comprising nickel, cobalt and manganese or aluminum on a current collector to thermally decompose a binder and a conductive material in the active material layer, thereby separating the current collector from the active material layer and recovering an active material in the active material layer; primarily washing the recovered active material with an aqueous lithium compound solution showing basicity in an aqueous solution state; adding a lithium precursor to the washed active material and annealing same; secondarily washing the annealed active material; and obtaining a reusable active material by surface-coating the secondarily washed active material.
Inventors:
SEONG EUN-KYU (KR)
KIM MIN-SEO (KR)
PARK SE-HO (KR)
SEO YONG-SIK (KR)
YANG DOO-KYUNG (KR)
LEE JEONG-BAE (KR)
KIM MIN-SEO (KR)
PARK SE-HO (KR)
SEO YONG-SIK (KR)
YANG DOO-KYUNG (KR)
LEE JEONG-BAE (KR)
Application Number:
PCT/KR2022/011328
Publication Date:
February 09, 2023
Filing Date:
August 01, 2022
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M10/54; C01G53/00; C22B7/00; H01M4/131
Foreign References:
| KR101992715B1 | 2019-06-25 | |||
| CN105870533A | 2016-08-17 | |||
| CN110010990B | 2020-12-01 | |||
| CN104577246A | 2015-04-29 | |||
| KR100503385B1 | 2005-07-26 | |||
| KR20210101580A | 2021-08-19 |
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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