US 2026/0279812 A1Published application

Electrode composition for lithium secondary battery, electrode slurry, electrode, and lithium secondary battery

AssigneeLG Energy Solution, Ltd.

InventorsMinjin KO, Yohan KWON, Young Jae KIM, Jaewook LEE, Jieun LEE, Chan Soo JUN

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Abstract

Disclosed is an electrode composition for a lithium secondary battery, including an electrode active material, a conductive material, and a binder, in which the binder is a copolymer of a (meth)acrylamide monomer, a (meth)acrylic acid monomer, an acrylonitrile monomer, and a metal-substituted (meth)acrylic acid monomer, and satisfies specified equations, an electrode slurry including the same, an electrode, and a lithium secondary battery. Accordingly, it is possible to solve the problem of volume expansion during repeated charging and discharging.

Claims13

Dependent claims

An electrode composition for a lithium secondary battery, the composition comprising:

an electrode active material;
a conductive material;
and
a binder,
wherein the binder comprises a copolymer of a (meth)acrylamide monomer, a (meth)acrylic acid monomer, a (meth)acrylonitrile monomer, and a metal-substituted (meth)acrylic acid monomer, and satisfies the following Equations (I) to (III):
1
≤
[
AM
]
/
(
[
AA
-
H
]
+
[
AA
-
M
]
)
≤
10
Equation
⁢
(
I
)
0.01
≤
[
AA
-
H
]
⁢
(
[
AA
-
H
]
+
[
AA
-
M
]
)
≤
0.5
Equation
⁢
(
II
)
2
≤
(
[
AM
]
+
[
AA
-
H
]
+
[
AA
-
M
]
)
⁢
/
[
AN
]
≤
10000
Equation
⁢
(
III
)
in Equations (I) to (III), based on 100 parts by weight of the binder;
[AM] indicates parts by weight of the (meth)acrylamide monomer,
[AA-H] indicates parts by weight of the (meth)acrylic acid monomer,
[AA-M] indicates parts by weight of the metal (M)-substituted (meth)acrylic acid monomer, and
[AN] indicates parts by weight of the (meth)acrylonitrile monomer.

92 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/873,974Filed 7 Dec 2023
Priority: KR 10-2022-018442326 Dec 2022
Published: 17 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H01M 4/622
Binders: being polymers
C09J 133/26
Homopolymers or copolymers of amides or imides: homopolymers or copolymers of acrylamide or methacrylamide
H01M 4/133
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…
H01M 4/134
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof: electrodes based on…

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