METHOD FOR PRODUCING ANODE AND ANODE PRODUCED THEREFROM

Title:

METHOD FOR PRODUCING ANODE AND ANODE PRODUCED THEREFROM

Document Type and Number:

WIPO Patent Application WO/2019/182361

Kind Code:

A1

Abstract:

The present invention relates to a method for producing a lithium secondary battery, comprising: (S1) preparing a preliminary anode by coating an anode slurry containing an anode active material, a conductive material, a binder, and a solvent on at least one surface of a current collector, drying and rolling same to form an anode active material layer; (S2) coating a lithium metal foil on the surface of the anode active material layer of the preliminary anode in the form of a pattern in which a pattern unit is arranged; (S3) punching the preliminary anode in which the lithium metal foil is pattern-coated to obtain an anode unit; (S4) impregnating the anode unit with an electrolyte to produce a pre-lithiated anode; and (S5) assembling the anode produced in step (S4) together with a cathode and a separator, wherein in step (S4), the pattern unit is positioned at a central portion of each anode unit, and at the same time, the pattern unit is punched to a size occupying an area of 10% to less than 100% of the surface of the anode unit.

Inventors:

CHAE OH-BYONG (KR)
WOO SANG-WOOK (KR)
KIM JE-YOUNG (KR)

Application Number:

PCT/KR2019/003266

Publication Date:

September 26, 2019

Filing Date:

March 20, 2019

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

H01M4/139; H01M4/04; H01M10/0525; H01M10/058

Foreign References:

KR20120092529A	2012-08-21
JPH06140028A	1994-05-20
KR20150089966A	2015-08-05
KR20180001229A	2018-01-04
KR20030023818A	2003-03-20
KR20180032219A	2018-03-29

Other References: