Composite electrolyte membrane and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-10364331-B2
Application number	US-201515318166-A
Country	US
Kind code	B2
Filing date	Jun 12, 2015
Priority date	Jun 13, 2014
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

The present application relates to a composite electrolyte membrane and a method for manufacturing the same. The composite electrolyte membrane according to the present application includes: a poly(arylene ether sulfone) copolymer including the repeating unit represented by Chemical Formula 1 and the repeating unit represented by Chemical Formula 2; and a core-shell particle including an inorganic particle core and a basic organic polymer shell.

First claim

What is claimed is:

1. A composite electrolyte membrane comprising:
a poly(arylene ether sulfone) copolymer including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2; and
a core-shell particle including an inorganic particle core and a basic organic polymer shell:

in Chemical Formulae 1 and 2,
R1 to R3 and R8 to R10 are each independently —O—, —S—, —SO 2 —, —C═O— or —C(CH 3 ) 2 —,
R4 to R7 and R13 to R16 are each independently hydrogen, or a straight-chained or branch-chained alkyl group having 1 to 10 carbon atoms,
at least one of R11, R12, and R18 is —SO 3 R17, and the others are hydrogen, or a straight-chained or branch-chained alkyl group having 1 to 10 carbon atoms,
R17 is H, Li, Na, or K,
A and A′ are each independently a direct bond, a divalent fluorene group, or a straight-chained or branch-chained alkylene group having 1 to 10 carbon atoms,
m, n, o, p, and r are each independently 0 to 4, and q, s, and t are each independently 0 to 3,
y is 0 or 1, and
a and b are a molar ratio of Chemical Formulae 1 and 2, and are each independently 0.1 to 0.99.

2. The composite electrolyte membrane of claim 1 , wherein the inorganic particle core comprises one or more selected from a group consisting of a silica particle, TiO 2 , and ZrO 2 .

3. The composite electrolyte membrane of claim 1 , wherein the inorganic particle core has a diameter of 20 to 900 nm.

4. The composite electrolyte membrane of claim 1 , wherein the inorganic particle core comprises a surface-treated inorganic particle, and
the surface treatment uses a silane-based compound, and is performed by a condensation reaction between the inorganic particle and the silane-based compound.

5. The composite electrolyte membrane of claim 4 , wherein a surface of the inorganic particle core comprises a vinyl group.

6. The composite electrolyte membrane of claim 1 , wherein the basic organic polymer shell comprises one or more selected from a group consisting of polymers prepared by using one or more selected from poly(4-vinylpyridine); and a monomer of the following structural formula:

7. The composite electrolyte membrane of claim 1 , wherein the basic organic polymer shell has a thickness of 5 to 20 nm.

8. The composite electrolyte membrane of claim 1 , wherein the composite electrolyte membrane is for a fuel cell.

9. A method for manufacturing a composite electrolyte membrane, the method comprising:
preparing a poly(arylene ether sulfone) copolymer including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2;
preparing a composition comprising: the poly(arylene ether sulfone) copolymer; and a core-shell particle comprising an inorganic particle core and a basic organic polymer shell; and
forming a composite electrolyte membrane by using the composition:

in Chemical Formulae 1 and 2,
R1 to R3 and R8 to R10 are each independently —O—, —S—, —SO 2 —, —C═O— or —C(CH 3 ) 2 —,
R4 to R7 and R13 to R16 are each independently hydrogen, or a straight-chained or branch-chained alkyl group having 1 to 10 carbon atoms,
at least one of R11, R12, and R18 is —SO 3 R17, and the others are hydrogen, or a straight-chained or branch-chained alkyl group having 1 to 10 carbon atoms,
R17 is H, Li, Na, or K,
A and A′ are each independently a direct bond, a divalent fluorene group, or a straight-chained or branch-chained alkylene group having 1 to 10 carbon atoms,
m, n, o, p, and r are each independently 0 to 4, and q, s, and t are each independently 0 to 3,
y is 0 or 1, and
a and b are a molar ratio of Chemical Formulae 1 and2, and are each independently 0.1 to 0.99.

10. A fuel cell comprising the composite electrolyte membrane of claim 1 .

Assignees

• Lg Chemical Ltd
• Seoul Nat Univ R&Db Foundation

Inventors

• Choi Seong Ho
• Lee Jong-Chan
• Kim Hyuk
• Kim Doyoung
• Kim Ji Hun
• Ko Taeyun
• Jung Bo-Kyung
• Kim Kihyun

Classifications

• C08K9/10

  Encapsulated ingredients · CPC title

• C08J5/2275 Primary

  Heterogeneous membranes · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M8/1048

  Ion-conducting additives, e.g. ion-conducting particles, heteropolyacids, metal phosphate or polybenzimidazole with phosphoric acid · CPC title

• C08G75/23

  Polyethersulfones · CPC title