Polymer electrolyte membrane

Patent metadata

Field	Value
Publication number	US-10483576-B2
Application number	US-201515531596-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 4, 2014
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

The present specification relates to a polymer electrolyte membrane including a polymer and inorganic particles.

First claim

The invention claimed is:

1. A polymer electrolyte membrane comprising:
a polymer including a unit represented by the following Chemical Formula 1; and
inorganic particles:

wherein, in Chemical Formula 1, 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; and
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.

2. The polymer electrolyte membrane of claim 1 , wherein the inorganic particles have a particle diameter of 5 nm to 50 μm.

3. The polymer electrolyte membrane of claim 1 , wherein the inorganic particles are one, two or more selected from the group consisting of inorganic matters, heteropolyacids and inorganic acids.

4. The polymer electrolyte membrane of claim 1 , wherein the inorganic particles are provided in a dispersed form in the polymer electrolyte membrane.

5. The polymer electrolyte membrane of claim 1 , wherein, based on a total solid content of the polymer electrolyte membrane, a content of the inorganic particles is from 0.05 weight % to 20 weight %, and a content of the polymer is from 80 weight % to 99.95weight %.

6. The polymer electrolyte membrane of claim 1 , wherein a first unit represented by Chemical Formula 1 is represented by any one of the following Chemical Formulae 1-1 to 1-9:

7. The polymer electrolyte membrane of claim 1 , wherein the polymer includes the unit represented by Chemical Formula 1 in 1 mol % to 100 mol %.

8. The polymer electrolyte membrane of claim 1 , wherein the polymer is a random polymer.

9. The polymer electrolyte membrane of claim 1 , wherein the polymer is a block polymer including a hydrophilic block; and a hydrophobic block, and the hydrophilic block includes the unit represented by Chemical Formula 1.

10. The polymer electrolyte membrane of claim 9 , wherein the hydrophilic block and the hydrophobic block are included in a molar ratio of 1:0.1 to 1:10 in the polymer.

11. The polymer electrolyte membrane of claim 1 , wherein the polymer further includes a brancher derived from a compound represented by the following Chemical Formula 2; or a brancher represented by the following Chemical Formula 3:

wherein, in Chemical Formulae 2 and 3, X is S; O; CO; SO; SO 2; NR; a hydrocarbon-based or fluorine-based assembly;
1 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;
an aromatic ring in which one, two or more are substituted with substituents selected from the group consisting of a hydroxyl group and a halogen group; or an aliphatic ring in which one, two or more are substituted with substituents selected from the group consisting of a hydroxyl group and a halogen group;
R is an aromatic ring substituted with a halogen group; or an aliphatic ring substituted with a halogen group; and
Z is a trivalent organic group.

12. The polymer electrolyte membrane of claim 1 , which has ion conductivity of greater than or equal to 0.01 S/cm and less than or equal to 0.5 S/cm.

13. The polymer electrolyte membrane of claim 1 , which has an ion exchange capacity (IEC) value of 0.01 mmol/g to 5 mmol/g.

14. The polymer electrolyte membrane of claim 1 , which has a thickness of 1 μm to 500 μm.

15. The polymer electrolyte membrane of claim 1 , which is a reinforced membrane further including a substrate.

16. A membrane-electrode assembly comprising:
an anode;
a cathode; and
the polymer electrolyte membrane of claim 1 provided between the anode and the cathode.

17. A polymer electrolyte-type fuel cell comprising:
two more of the membrane-electrode assemblies of claim 16 ;
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.

18. 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 1 provided between the positive electrode cell and the negative electrode cell.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Youngjea
• Han Joong Jin
• Yu Yunah
• Kang Esder
• Jang Yong Jin

Classifications

• C08J5/2262

  containing fluorine · CPC title

• C08J2371/10

  from phenols · CPC title

• H01M8/1027

  having carbon, oxygen and other atoms, e.g. sulfonated polyethersulfones [S-PES] · CPC title

• H01M8/1051 Primary

  Non-ion-conducting additives, e.g. stabilisers, SiO2 or ZrO2 · CPC title

• H01M8/1004

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title