METHOD FOR PREPARING CATHODE ADDITIVE FOR LITHIUM SECONDARY BATTERY, AND CATHODE ADDITIVE FOR LITHIUM SECONDARY BATTERY, PREPARED THEREBY

Title:

METHOD FOR PREPARING CATHODE ADDITIVE FOR LITHIUM SECONDARY BATTERY, AND CATHODE ADDITIVE FOR LITHIUM SECONDARY BATTERY, PREPARED THEREBY

Document Type and Number:

WIPO Patent Application WO/2020/080800

Kind Code:

A1

Abstract:

The present invention relates to: a method for preparing a cathode additive for a lithium secondary battery, the cathode additive having a high irreversible capacity and being capable of preventing gelation and reducing gas generation; and the cathode additive prepared thereby. The method for preparing a cathode additive comprises a step of mixing a lithium material, a nickel material and, optionally, a material containing an element M, and then heat-treating same, thereby preparing a predetermined lithium nickel oxide, wherein the lithium material comprises Li2O and LiOH, and LiOH is used in an amount of 5-10 wt% on the basis of the total weight of the lithium material.

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Inventors:

LEE BORAM (KR)
PARK SIN YOUNG (KR)
LEE DAEJIN (KR)
KIM HAKYOON (KR)
KIM TAEGON (KR)
JUNG WANG MO (KR)

Application Number:

PCT/KR2019/013520

Publication Date:

April 23, 2020

Filing Date:

October 15, 2019

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

C01G53/00; H01M4/02; H01M4/505; H01M4/525; H01M4/62; H01M10/052

Foreign References:

KR20090006898A	2009-01-16
KR20150079362A	2015-07-08
KR20180046689A	2018-05-09
KR101064729B1	2011-09-14
KR101553389B1	2015-09-30
KR20190035315A	2019-04-03

Other References:

RIETVELD, H.M.L: "Line Profiles of Neutron Powder-diffraction Peaks for Structure Refinement", ACTA. CRYST., vol. 22, 1967, pages 151 - 2
BISH D.L.HOWARD C.J.: "Quantitative phase analysis using the Rietveld method", J. APPL. CRYST., vol. 21, 1988, pages 86 - 91
See also references of EP 3789347A4

Attorney, Agent or Firm:

YOU ME PATENT AND LAW FIRM (KR)

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