Fluorine-based compound for brancher, polymer using same, and polymer electrolyte membrane using same

Patent metadata

Field	Value
Publication number	US-10526282-B2
Application number	US-201515515007-A
Country	US
Kind code	B2
Filing date	Oct 28, 2015
Priority date	Oct 28, 2014
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

The present specification relates to a fluorine-based compound for a brancher, a polymer using the same, a polymer electrolyte membrane using the same, a fuel cell using the same, and a redox flow battery including the same.

First claim

The invention claimed is:

1. A polymer, comprising a unit derived from a compound for a brancher represented by the following Chemical Formula 1,
wherein the unit derived from the compound for a brancher is included in greater than or equal to 0.001% by weight and less than or equal to 10% by weight with respect to a total weight of the polymer:

wherein, in Chemical Formula 1,
R1 to R10 are the same as or different from each other, and each independently hydrogen or a halogen group;
two of R1 to R5 are a halogen group;
two of R6 to R10 are a halogen group;
X 1 and X 2 are the same as or different from each other, and each independently NR, O, S or SO 2 ;
R is hydrogen; deuterium; or a substituted or unsubstituted alkyl group; and
n is an integer of 1 to 6.

2. The polymer of claim 1 , wherein the halogen group in Chemical Formula 1 is fluorine or chlorine.

3. The polymer of claim 1 , wherein R3, R5, R6 and R8 in Chemical Formula 1 are a halogen group.

4. The polymer of claim 1 , wherein n in Chemical Formula 1 is 2 or more.

5. The polymer of claim 1 , wherein X 1 and X 2 in Chemical Formula 1 are the same as or different from each other, and each independently S or SO 2 .

6. The polymer of claim 1 , wherein the compound for a brancher represented by Chemical Formula 1 is any one selected from the following structures:

7. The polymer of claim 1 , which is a block-type copolymer including hydrophilic blocks and hydrophobic blocks.

8. The polymer of claim 1 , wherein the unit derived from the compound for a brancher is located between the hydrophilic blocks, between the hydrophobic blocks or between the hydrophilic block and the hydrophobic block.

9. The polymer of claim 1 , which has a weight average molecular weight of greater than or equal to 500 and less than or equal to 5,000,000 (g/mol).

10. The polymer of claim 1 , which has a polydispersity index (PDI) of greater than or equal to 1 and less than or equal to 6 (Mw/Mn).

11. A polymer electrolyte membrane comprising the polymer of claim 1 .

12. The polymer electrolyte membrane of claim 11 , 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. A membrane-electrode assembly comprising:
a positive electrode;
a negative electrode; and
an electrolyte membrane provided between the positive electrode and the negative electrode,
wherein the electrolyte membrane is the polymer electrolyte membrane of claim 11 .

14. A polymer electrolyte-type fuel cell comprising:
a stack including two or more of the membrane-electrode assemblies of claim 13 and 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.

15. 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 11 provided between the positive electrode cell and the negative electrode cell.

16. The polymer of claim 1 , wherein the unit derived from the compound for a brancher is one of the following units:

17. A polymer, comprising a unit derived from a compound for a brancher represented by the following Chemical Formula 1,
wherein the unit derived from the compound for a brancher is included in greater than or equal to 0.001% by weight and less than or equal to 10% by weight with respect to a total weight of the polymer:

wherein, in Chemical Formula 1,
R3, R5, R6 and R8 are the same as or different from each other, and each independently a halogen group, and R1, R2, R4, R7, R9 and R10 are a hydrogen;
X 1 and X 2 are the same as or different from each other, and each independently NR, O, S or SO 2 ;
R is hydrogen; deuterium; or a substituted or unsubstituted alkyl group; and
n is an integer of 1 to 6.

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• H01M8/1039

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

• C08G75/0245

  Block or graft polymers · CPC title

• C08L71/00

  Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers · CPC title

• C08G2650/40

  containing ketone groups, e.g. polyarylethylketones, PEEK or PEK · CPC title

• C07C323/09 Primary

  having sulfur atoms of thio groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton · CPC title