Ion-conductive polymer, and lithium secondary battery electrode and lithium secondary battery which comprise same

Patent metadata

Field	Value
Publication number	US-2025300179-A1
Application number	US-202519230862-A
Country	US
Kind code	A1
Filing date	Jun 6, 2025
Priority date	Aug 20, 2019
Publication date	Sep 25, 2025
Grant date	—

Abstract

The present disclosure relates to an ion-conductive polymer, an electrode including the same, and a lithium secondary battery including the electrode. The ion-conductive polymer includes a first monomer represented by Formula 1 below.

In Formula 1, A, L 1 to L 2 , L 11 , a1 to a2, a11, R 1 to R 3 , and n1 to n2 are as defined in the detailed description.

First claim

1 . An ion-conductive polymer comprising a first monomer represented by Formula 1; and at least one selected from a conjugated diene-based monomer, a (meth)acrylic acid ester-based monomer, a styrene-based monomer, an unsaturated carboxylic acid monomer, an acrylonitrile-based monomer, and a (meth)acrylamide-based monomer:

wherein, in Formula 1,
A is a substituted or unsubstituted C 1 -C 10 alkyl group, a substituted or unsubstituted C 2 -C 10 alkenyl group, or a substituted or unsubstituted C 2 -C 10 alkynyl group,
L 1 , L 2 , and L 11 are each independently selected from *—O—*′, a substituted or unsubstituted C 1 -C 10 alkyl group, a substituted or unsubstituted C 2 -C 10 alkenyl group, and a substituted or unsubstituted C 2 -C 10 alkynyl group,
a1, a2 and a11 are each independently an integer selected from 0 to 5,
R 1 to R 3 are each independently selected from a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted C 1 -C 10 alkyl group, a substituted or unsubstituted C 2 -C 10 alkenyl group, and a substituted or unsubstituted C 2 -C 10 alkynyl group,
n1 and n2 are each independently an integer selected from 1 to 5, and
*and*′ are bonding sites with neighboring atoms, and
wherein the ion-conductive polymer is a random copolymer, or an alternating copolymer.

2 . The ion-conductive polymer of claim 1 , wherein A is a substituted or unsubstituted C 1 -C 5 alkyl group.

3 . The ion-conductive polymer of claim 1 , wherein L 1 , L 2 , and L 11 are each independently selected from *—O—*′ and a substituted or unsubstituted C 1 -C 10 alkyl group.

4 . The ion-conductive polymer of claim 1 , wherein L 11 is selected from: an ethyl group, a propyl group, a butyl group, and a pentyl group; and an ethyl group, a propyl group, a butyl group, and a pentyl group, each being substituted with a methyl group.

5 . The ion-conductive polymer of claim 1 , wherein R 1 is a hydrogen atom or a substituted or unsubstituted C 1 -C 5 alkyl group.

6 . The ion-conductive polymer of claim 1 , wherein R 2 and R 3 are hydrogen atoms.

7 . The ion-conductive polymer of claim 1 , wherein the first monomer is selected from groups represented by Formulas 1-1 to 1-88 below:

wherein, in Formulas 1-1 to 1-88,
X 1 to X 5 are groups each represented by

 Y 1 to Y 5 are groups each represented by

Z 1 to Z 6 are each independently selected from hydrogen, deuterium, a C 1 -C 10 alkyl group, a C 2 -C 10 alkenyl group, a C 2 -C 10 alkynyl group, a cyano group, a hydroxyl group, a halogen group, a nitro group, deuterium, a C 1 -C 10 alkyl group, a C 2 -C 10 alkenyl group, a C 2 -C 10 alkynyl group, a cyano group, a hydroxyl group, a halogen group, a C 1 -C 10 alkyl group substituted with a nitro group, a C 2 -C 10 alkenyl group substituted with a nitro group, and a C 2 -C 10 alkynyl group substituted with a nitro group, and
d2 is an integer selected from 0 to 2.

8 . The ion-conductive polymer of claim 1 , wherein a content of the first monomer is 0.1 wt % to 30 wt % based on a total weight of total monomers included in the ion-conductive polymer.

9 . The ion-conductive polymer of claim 1 , wherein the conjugated diene-based monomer is at least one selected from 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, and 1,3-pentadiene.

10 . The ion-conductive polymer of claim 1 , wherein the (meth)acrylic acid ester-based monomer is at least one selected from methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, t-butyl acrylate, n-hexyl acrylate, 2-hexyl methacrylate, n-amyl acrylate, isoamyl acrylate, 2-ethylhexyl acrylate, and lauryl methacrylate.

11 . The ion-conductive polymer of claim 1 , wherein the styrene-based monomer is at least one selected from styrene, α-methylstyrene, β-methylstyrene, p-t-butyl styrene, and divinylbenzene.

12 . The ion-conductive polymer of claim 1 , wherein the unsaturated carboxylic acid monomer is at least one selected from acrylic acid, methacrylic acid, itaconic acid, fumaric acid, maleic acid, citraconic acid, methaconic acid, glutaconic acid, tetralidrophthalic acid, crotonic acid, and isocrotonic acid.

13 . The ion-conductive polymer of claim 1 , wherein the acrylonitrile-based monomer is at least one selected from acrylonitrile and methacrylonitrile.

14 . The ion-conductive polymer of claim 1 , wherein the (meth)acrylamide-based monomer is at least one selected from acrylamide, methacrylamide, n-methylolacrylamide, and n-butoxymethylacrylamide.

15 . The ion-conductive polymer of claim 1 , wherein the ion-conductive polymer has an average particle diameter D50 of 20 to 500 nm.

16 . The ion-conductive polymer of claim 1 , wherein the ion-conductive polymer has a glass transition temperature (Tg) of −20 to 30° C.

17 . The ion-conductive polymer of claim 1 , wherein the ion-conductive polymer has a gel content of 50 wt % to 99 wt %.

18 . An electrode for a lithium secondary battery, the electrode comprising: the ion-conductive polymer of claim 1 .

19 . A lithium secondary battery comprising: a cathode; an anode; and an electrolyte interposed therebetween, wherein at least one selected from the cathode and the anode is the electrode of claim 18 .

Assignees

• Samsung Sdi Co Ltd
• Hansol Chemical Co Ltd

Inventors

• Lee Jungmin
• Kim Minjae
• Kim Yuhyun
• Kim Changbeom
• Park Jihye
• Oh Seunghyun

Classifications

• C08F212/08

  Styrene · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title