Title:
METHOD FOR REUSING ACTIVE MATERIAL USING POSITIVE ELECTRODE SCRAP
Document Type and Number:
WIPO Patent Application WO/2021/241835
Kind Code:
A1
Abstract:
A method for recovering and reusing an active material from a positive electrode scrap is provided. The method for reusing a positive electrode active material of the present invention comprises the steps of: (a) heat-treating, in air, a positive electrode scrap including a lithium composite transition metal oxide positive electrode active material layer containing nickel, cobalt, and manganese on a current collector so as to thermally decompose a binder and a conductive material in the active material layer, such that the current collector is separated from the active material layer and the active material in the active material layer is recovered; (b) washing the recovered active material with an aqueous lithium compound solution showing basicity in an aqueous solution and drying same; and (c) adding a lithium precursor to the washed active material and annealing same so as to obtain a reusable active material.
Inventors:
KIM MIN-SEO (KR)
PARK SE-HO (KR)
YANG DOO-KYUNG (KR)
PARK SE-HO (KR)
YANG DOO-KYUNG (KR)
Application Number:
PCT/KR2021/000617
Publication Date:
December 02, 2021
Filing Date:
January 15, 2021
Export Citation:
Assignee:
LG ENERGY SOLUTION LTD (KR)
International Classes:
H01M10/54; C01G53/00; C22B7/00; H01M4/131
Foreign References:
| KR20000019850A | 2000-04-15 | |||
| JP6055761B2 | 2016-12-27 | |||
| KR20170033787A | 2017-03-27 | |||
| US8846225B2 | 2014-09-30 | |||
| JP2016149330A | 2016-08-18 | |||
| KR20200062371A | 2020-06-03 |
Other References:
See also references of EP 4099476A4
Attorney, Agent or Firm:
PHIL & ONZI INT'L PATENT & LAW FIRM (KR)
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