CATHODE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND CATHODE AND LITHIUM SECONDARY BATTERY EACH COMPRISING SAME

Title:

CATHODE MATERIAL FOR LITHIUM SECONDARY BATTERY, AND CATHODE AND LITHIUM SECONDARY BATTERY EACH COMPRISING SAME

Document Type and Number:

WIPO Patent Application WO/2021/187907

Kind Code:

A1

Abstract:

The present invention relates to a cathode material comprising: a first cathode active material, which is composed of large-particle diameter particles having a large average particle diameter; and a second cathode active material, which is composed of small-particle diameter particles having a small average particle diameter, wherein the first cathode active material and the second cathode active material are each independently a lithium transition metal oxide in which the molar ratio of nickel among transition metals is 80 mol% or more, and satisfy the following formula (1). Formula (1): 0 <{(B-A)/B}× 100 ≤ 10. In formula (1), A is a particle strength value of the first cathode active material, and B refers to a particle strength value of the second cathode active material.

Inventors:

LEE WOO RAM (KR)
EOM JUN HO (KR)
PARK NA RI (KR)
KANG DONG RYOUNG (KR)
KIM JAE GEUN (KR)

Application Number:

PCT/KR2021/003342

Publication Date:

September 23, 2021

Filing Date:

March 18, 2021

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

H01M4/36; H01M4/02; H01M4/505; H01M4/525; H01M10/052

Foreign References:

KR20050044771A	2005-05-12
KR20170103184A	2017-09-13
JP2018535520A	2018-11-29
KR20120126021A	2012-11-20
KR20180104837A	2018-09-27
KR20200033435A	2020-03-30
JPH031500B2	1991-01-10

Other References: