Polymer and polymer electrolyte membrane comprising same

Patent metadata

Field	Value
Publication number	US-10407521-B2
Application number	US-201515531662-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 4, 2014
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

The present specification relates to a polymer and a polymer electrolyte membrane including the same.

First claim

The invention claimed is:

1. A random polymer comprising:
a unit represented by the following Chemical Formula 1; and
a brancher unit represented by the following Chemical Formula 2 or a brancher unit represented by the following Chemical Formula 3:

wherein, in Chemical Formulae 1 to 3,
A is —SO 3 H, —SO 3 − M + , —COOH, —COO − M + , —PO 3 H 2 , —PO 3 H − M + , —PO 3 2− 2M + , —O(CF 2 ) m SO 3 H, —O(CF 2 ) m SO 3 − M + , —O(CF 2 ) m COOH, —O(CF 2 ) m COO − M + , —O(CF 2 ) m PO 3 H 2 , —O(CF 2 ) m PO 3 H − M + or —O(CF 2 ) m PO 3 2− 2M + ;
m is an integer of 2 to 6;
M is a group 1 element;
R1 and R2 are the same as or different from each other, and each independently a halogen group;
n is an integer of 2 to 10, and structures in the 2 to 10 parentheses are the same as or different from each other;
X is S; O; CO; SO; SO 2 ; NR; a hydrocarbon-based or fluorine-based assembly;
l is an integer of 0 to 10;
when 1 is 2 or greater, two or more Xs are the same as or different from each other;
Y1 and Y2 are the same as or different from each other, and each independently NRR; or an aromatic ring in which each aromatic ring has a first bond to a first adjacent substituent or a first main chain of the polymer and a second bond to a second adjacent substituent or a second main chain of the polymer;
R is an aromatic ring with a bond to an adjacent substituent or a main chain of the polymer; and
Z is a trivalent organic group.

2. The random polymer of claim 1 , wherein A is —SO 3 H or —SO 3 − M + .

3. The random polymer of claim 1 , wherein n is an integer of 2 to 6.

4. The random polymer of claim 1 , wherein the unit represented by Chemical Formula 1 is represented by any one of the following Chemical Formulae 1-1 to 1-9:

5. The random polymer of claim 1 , wherein the brancher unit represented by Chemical Formula 3 is any one of the following structures:

6. The random polymer of claim 1 , which has a weight average molecular weight of 500 g/mol to 5,000,000 g/mol.

7. A polymer electrolyte membrane comprising the random polymer of claim 1 .

8. A reinforced membrane comprising:
a substrate; and
the random polymer of claim 1 .

9. The polymer electrolyte membrane of claim 7 , which has ion conductivity of 0.01 S/cm to 0.5 S/cm.

10. The polymer electrolyte membrane of claim 7 , which has an ion exchange capacity (IEC) value of 0.01 mmol/g to 5 mmol/g.

11. A membrane-electrode assembly comprising:
an anode;
a cathode; and
the polymer electrolyte membrane of claim 7 provided between the anode and the cathode.

12. A polymer electrolyte-type fuel cell comprising:
two or more of the membrane-electrode assemblies of claim 11 ;
a stack including a bipolar plate provided between the membrane-electrode assemblies;
a fuel supplying unit supplying fuel to the stack; and
an oxidizer supplying unit supplying an oxidizer to the stack.

13. A redox flow battery comprising:
a positive electrode cell including a positive electrode and a positive electrode liquid electrolyte;
a negative electrode cell including a negative electrode and a negative electrode liquid electrolyte; and
the polymer electrolyte membrane of claim 7 provided between the positive electrode cell and the negative electrode cell.

14. A membrane-electrode assembly comprising:
an anode;
a cathode; and
the reinforced membrane of claim 8 provided between the anode and the cathode.

15. A polymer electrolyte-type fuel cell comprising:
two or more of the membrane-electrode assemblies of claim 14 ;
a stack including a bipolar plate provided between the membrane-electrode assemblies;
a fuel supplying unit supplying fuel to the stack; and
an oxidizer supplying unit supplying an oxidizer to the stack.

16. A redox flow battery comprising:
a positive electrode cell including a positive electrode and a positive electrode liquid electrolyte;
a negative electrode cell including a negative electrode and a negative electrode liquid electrolyte; and
the reinforced membrane of claim 8 provided between the positive electrode cell and the negative electrode cell.

Assignees

• Lg Chemical Ltd

Inventors

• Kang Esder
• Ryu Hyun Woog
• Han Joong Jin
• Kim Youngjea
• Jung Sehee
• Jang Yong Jin

Classifications

• H01M8/1039

  halogenated, e.g. sulfonated polyvinylidene fluorides · CPC title

• H01M8/1025

  having only carbon and oxygen, e.g. polyethers, sulfonated polyetheretherketones [S-PEEK], sulfonated polysaccharides, sulfonated celluloses or sulfonated polyesters · CPC title

• H01M8/1023 Primary

  having only carbon, e.g. polyarylenes, polystyrenes or polybutadiene-styrenes · CPC title

• C08L65/00

  Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers · CPC title

• C08G65/48

  Polymers modified by chemical after-treatment · CPC title