Novel compound and polymer electrolyte membrane using same

Patent metadata

Field	Value
Publication number	US-2017346121-A1
Application number	US-201515519978-A
Country	US
Kind code	A1
Filing date	Dec 2, 2015
Priority date	Dec 19, 2014
Publication date	Nov 30, 2017
Grant date	—

Abstract

The present specification relates to a novel compound, a polymer electrolyte membrane including the same, a membrane-electrode assembly including the polymer electrolyte membrane, a fuel cell including the membrane-electrode assembly, and a redox flow battery including the polymer electrolyte membrane.

First claim

1 . A compound represented by the following Chemical Formula 1:

wherein, in Chemical Formula 1,
A is a sulfonyl group (—SO 2 —) or a carbonyl group (—CO—);
R1, R3 and R5 are the same as or different from each other, and each independently hydrogen or a halogen group;
R2 and R4 are the same as or different from each other, and each independently hydrogen, a hydroxyl group or a halogen group;
R6 and R7 are the same as or different from each other, and each independently hydrogen or a halogen group;
R8 to R10 are the same as or different from each other, and each independently selected from the group consisting of hydrogen, —SO 3 H, —SO 3 − M + , —COOH, —COO − M + , —PO 3 H 2 , —PO 3 H − M + and —PO 3 2− 2M + ;
at least one of R8 to R10 is selected from the group consisting of —SO 3 H, —SO 3 − M + , —COOH, —COO − M + , —PO 3 H 2 , —PO 3 H − M + and —PO 3 2− 2M + ;
M is a group 1 element;
a is an integer of 0 to 3; and
when a is an integer of 2 or greater, a plurality of R6s and R7s are each independently the same as or different from each other.

2 . The compound of claim 1 , wherein at least one of R1 to R7 is a halogen group, and the halogen group is selected from between chlorine and fluorine.

3 . The compound of claim 1 , wherein R1 and R3 are a halogen group, and R2, R4 and R5 are hydrogen.

4 . The compound of claim 1 , wherein at least one of R8 to R10 is —SO 3 H or —SO 3 − M + .

5 . The compound of claim 1 , wherein a is 0.

6 . The compound of claim 1 , wherein A is a sulfonyl group, and a is an integer of 1 to 3.

7 . The compound of claim 1 , wherein the compound represented by Chemical Formula 1 is any one selected from among the following structures:

8 . A polymer comprising a monomer derived from the compound of claim 1 .

9 . The polymer of claim 8 , which includes the monomer in 0.1 mol % to 100 mol %.

10 . A polymer electrolyte membrane comprising the polymer of claim 8 .

11 . The polymer electrolyte membrane of claim 10 , wherein the polymer has a weight average molecular weight of greater than or equal to 500 g/mol and less than or equal to 5,000,000 g/mol.

12 . The polymer electrolyte membrane of claim 10 , which has a thickness of greater than or equal to 1 μm and less than or equal to 500 μm.

13 . The polymer electrolyte membrane of claim 10 , which has ion conductivity of greater than or equal to 0.01 S/cm and less than or equal to 0.5 S/cm.

14 . A membrane-electrode assembly comprising:
an anode; a cathode; and the polymer electrolyte membrane of claim 10 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 polymer electrolyte membrane of claim 10 provided between the positive electrode cell and the negative electrode cell.

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• H01M8/1032

  having sulfur, e.g. sulfonated-polyethersulfones [S-PES] · CPC title

• H01M8/18

  Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells · CPC title

• H01M8/188

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title

• C07C317/14

  having sulfone or sulfoxide groups bound to carbon atoms of six-membered aromatic rings · CPC title

• H01M8/1027

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