US 2026/0279786 A1Published application

Cathode active material for lithium secondary battery and lithium secondary battery including the same

AssigneesSK On Co., Ltd., SK Innovation Co., Ltd.

InventorsJi Yae DO, Jeong Bae YOON, Min Suk KANG, Hee Jun KWEON, Sang Bok KIM, Yong Hyun CHO, Dong Wook HA

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Abstract

A cathode active material for a lithium secondary battery according to an embodiment of the present invention includes a lithium-transition metal oxide particle. The lithium-transition metal oxide particle has a FWHM ratio measured by an in-situ X-ray Diffraction spectroscopy (XRD) and defined by Equation 1 of 400% or less. Life-span properties of a lithium secondary battery can be improved by preventing deformation of a lattice structure and/or a crystal structure in the lithium-transition metal composite oxide particles.

Claims11

Dependent claims

A cathode active material for a lithium secondary comprising a lithium-transition metal oxide particle, wherein the lithium-transition metal oxide particle has a full width at half maximum (FWHM) change ratio measured by an in-situ X-ray Diffraction spectroscopy (XRD) and defined by Equation 1 of 350% or less:

FWHM
⁢
change
⁢
ratio
⁢
(
%
)
=
100
*
(
FWHM
max
(
113
)
/
FWHM
min
(
113
)
)
[
Equation
⁢
2
]
wherein, in Equation 2, FWHMmax(113) is a maximum FWHM value of a (113) plane peak of the lithium-transition metal oxide particle measured by the in-situ XRD, and FWHMmin(113) is a minimum FWHM value of a (113) plane peak of the lithium-transition metal oxide particle measured by the in-situ XRD.

28 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/671,232Filed 8 May 2026
Priority: KR 10-2022-00563949 May 2022
Published: 17 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

H01M 4/505
Of manganese: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
C01G 53/50
Containing manganese: of the type n-, e.g. LiO2 or LiO2
C01G 53/504
Containing lithium and cobalt: with the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.5,…
C01G 53/506
With the molar ratio of nickel with respect to all the metals other than alkali metals higher than or equal to 0.5, e.g. LiO2 with x ≥ 0.5: with…

Family

Application18/306,241Continuation · filed 25 Apr 2023
Application19/671,232Continuation
US 12,658,431 B2Related patent
US 2023/0361291 A1Published application
US 2026/0279786 A1This patent

From the US filing history. Foreign family members aren’t listed.