Title:
REUSE METHOD OF ACTIVE MATERIAL OF POSITIVE ELECTRODE
Document Type and Number:
WIPO Patent Application WO/2023/027436
Kind Code:
A1
Abstract:
A reuse method of an active material of a positive electrode of the present invention comprises the steps of: immersing a stack cell, in which a positive electrode plate, a separator, and a negative electrode plate are stacked and combined, in a polar solvent to separate the positive electrode plate; heat-treating the separated positive electrode plate to thermally decompose a binder and a conductive material in a positive electrode active material layer of the positive electrode plate, thereby separating a current collector of the positive electrode plate from the active material layer and recovering an active material in the active material layer; washing the recovered active material with an aqueous solution of a lithium compound, which exhibits basicity in an aqueous solution thereof; and adding a lithium precursor to the washed active material, followed by annealing, thereby obtaining a reusable active material.
Inventors:
KIM MIN-SEO (KR)
YANG DOO-KYUNG (KR)
PARK SE-HO (KR)
SEO YONG-SIK (KR)
SEONG EUN-KYU (KR)
LEE JEONG-BAE (KR)
YANG DOO-KYUNG (KR)
PARK SE-HO (KR)
SEO YONG-SIK (KR)
SEONG EUN-KYU (KR)
LEE JEONG-BAE (KR)
Application Number:
PCT/KR2022/012460
Publication Date:
March 02, 2023
Filing Date:
August 19, 2022
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M10/54; C01G53/00; C22B7/00
Foreign References:
| KR101992715B1 | 2019-06-25 | |||
| CN105870533A | 2016-08-17 | |||
| CN110010990B | 2020-12-01 | |||
| KR102156796B1 | 2020-09-16 | |||
| KR100503385B1 | 2005-07-26 | |||
| KR20210113482A | 2021-09-16 |
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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