Ion exchange separation membrane, electrochemical cell including same, flow cell and fuel cell, and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10711093-B2
Application number	US-201716067913-A
Country	US
Kind code	B2
Filing date	Feb 21, 2017
Priority date	Mar 31, 2016
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

The present specification relates to an ion exchange membrane, an electrochemical cell, a flow battery and a fuel cell comprising the same, and a method for manufacturing the same.

First claim

The invention claimed is:

1. An ion exchange polymer membrane having an ion channel provided with an ion transferring group, comprising:
a bonding structure formed by at least one ion transferring group comprising —NH 3 + OH − or —SO 3 − X, wherein X is a monovalent cation, and at least one compound of Chemical Formula 1:

wherein, in Chemical Formula 1,
R1 and R2 are each hydrogen, an alkyl group or a sulfonic acid group;
L is a direct bond, —O—, —S—, —NH— or —SO 2 —;
a1 and a3 are each 1 or 2;
a2 and a4 are each an integer of 0 to 4; and
1≤a1+a2≤5 and 1≤a3+a4≤5;

wherein when the at least one ion transferring group comprises —SO 3 − X, the bonding structure includes at least one structure represented by the following Chemical Formulae 3 to 7:

wherein in Chemical Formulae 3 to 7:
R3 to R6 are each hydrogen, an alkyl group or a sulfonic acid group;
L1 and L2 are each a direct bond, —O—, —S—, —NH— or —SO 2—;
b1 and b3 are each 0 or 1;
b2 and b4 are each an integer of 0 to 4;
0≤b1+b2≤4 and 0≤b3+b4≤4;
c1 and c2 are each an integer of 0 to 3;
c3 is 1 or 2, c4 is an integer of 0 to 4 and 1≤c3+c4≤5;
c5 is 0 or 1, c6 is an integer of 0 to 4 and 0≤c5+c6≤4; and

represents a bonding site; and
wherein when the at least one ion transferring group comprises —NH 3 + OH − , the bonding structure includes at least one structure represented by the following Chemical Formulae 8 to 12:

wherein in Chemical Formulae 8 to 12:
R3 to R6 are each hydrogen, an alkyl group or a sulfonic acid group;
L1 and L2 are each a direct bond, —O—, —S—, —NH— or —SO 2 —;
d1, d3 and d5 are each 1 or 2;
d2 and d4 are each an integer of 0 to 3;
d6 is an integer of 0 to 4;
1≤d1+d2≤4, 1≤d3+d4≤4 and 1≤d5+d6≤5;
e1, e3, e5 and d7 are each 1 or 2;
e2 and e4 are each an integer of 0 to 2;
e6 is an integer of 0 to 4;
e8 is an integer of 0 to 3; and
1≤e1+e2≤3, 1≤e3+e4≤3, 1≤e5+e6≤5 and 1≤e7+e8≤4.

2. The ion exchange polymer membrane of claim 1 , wherein lengths of the compound represented by Chemical Formula 1 are greater than or equal to 1 nm and less than or equal to 4 nm.

3. The ion exchange polymer membrane of claim 1 , wherein a size of the ion channel of the ion exchange polymer membrane at relative humidity (RH) 100% or in a state of being completely wet in a electrolytic solution is less than 5 nm.

4. The ion exchange polymer membrane of claim 1 , wherein the ion exchange polymer membrane is a fluorine-based ion exchange polymer membrane, a partial fluorine-based ion exchange polymer membrane or a hydrocarbon-based ion exchange polymer membrane.

5. An electrochemical cell comprising:
an anode;
a cathode; and
the ion exchange polymer membrane of claim 1 provided between the anode and the cathode.

6. A flow battery comprising:
an anode;
a cathode; and
the ion exchange polymer membrane of claim 1 provided between the anode and the cathode.

7. A membrane electrode assembly comprising:
an anode;
a cathode; and
the ion exchange polymer membrane of claim 1 provided between the anode and the cathode.

8. A fuel cell comprising the membrane electrode assembly of claim 7 .

9. A method for manufacturing an ion exchange polymer membrane comprising:
preparing an ion exchange polymer membrane having an ion channel provided with an ion transferring group comprising —NH 3 + OH − or —SO 3 − X, wherein X is a monovalent cation; and
forming a bonding structure with at least one ion transferring group of the ion exchange polymer membrane and at least one compound represented by the following Chemical Formula 1, by using a composition including at least one compound represented by the following Chemical Formula 1:

wherein, in Chemical Formula 1,
R1 and R2 are each hydrogen, an alkyl group or a sulfonic acid group;
L is a direct bond, —O—, —S—, —NH— or —SO 2 —;
a1 and a3 are each 1 or 2;
a2 and a4 are each an integer of 0 to 4; and
1≤a1+a2≤5 and 1≤a3+a4≤5;

wherein when the at least one ion transferring group comprises —SO 3 − X, the bonding structure includes at least one structure represented by the following Chemical Formulae 3 to 7:

wherein in Chemical Formulae 3 to 7:
R3 to R6 are each hydrogen, an alkyl group or a sulfonic acid group;
L1 and L2 are each a direct bond, —O—, —S—, —NH— or —SO 2 —;
b1 and b3 are each 0 or 1;
b2 and b4 are each an integer of 0 to 4;
0≤b1+b2≤4 and 0≤b3+b4≤4;
c1 and c2 are each an integer of 0 to 3;
c3 is 1 or 2, c4 is an integer of 0 to 4 and 1≤c3+c4≤5;
c5 is 0 or 1, c6 is an integer of 0 to 4 and 0≤c5+c6≤4; and

represents a bonding site; and
wherein when the at least one ion transferring group comprises —NH 3 + OH − , the bonding structure includes at least one structure represented by the following Chemical Formulae 8 to 12:

wherein in Chemical Formulae 8 to 12:
R3 to R6 are each hydrogen, an alkyl group or a sulfonic acid group;
L1 and L2 are each a direct bond, —O—, —S—, —NH— or —SO 2 —;
d1, d3 and d5 are each 1 or 2;
d2 and d4 are each an integer of 0 to 3;
d6 is an integer of 0 to 4;
1≤d1+d2<4, 1≤d3+d4≤4 and 1≤d5+d6≤5;
e1, e3, e5 and d7 are each 1 or 2;
e2 and e4 are each an integer of 0 to 2;
e6 is an integer of 0 to 4;
e8 is an integer of 0 to 3; and
1≤e1+e2≤3, 1≤e3+e4≤3, 1≤e5+e6≤5 and 1≤e7+e8≤4.

10. The method for manufacturing an ion exchange polymer membrane of claim 9 , wherein the forming of a bonding structure comprises impregnating the ion exchange polymer membrane into a composition including the at least one compound represented by Chemical Formula 1.

11. The method for manufacturing an ion exchange polymer membrane of claim 9 , wherein a molar ratio between the ion transferring group of the ion exchange polymer membrane and the at least one compound represented by Chemical Formula 1 in the composition is greater than or equal to 1:0.05 and less than or equal to 1:0.7.

12. An ion exchange polymer membrane having an ion channel provided with an ion transferring group, comprising a bonding structure represented by at least one compound represented by the following Chemical Formulae 3 to 12:

wherein in Chemical Formulae 3 to 7:
R3 to R6 are each hydrogen, an alkyl group or a sulfonic acid group;

Assignees

• Lg Chemical Ltd

Inventors

• Moon Sikwon
• Noh Tae Geun
• KIM Sungyeon
• Byun Sujin
• Jeong Bong Hyun
• Min Geungi
• Lee Jeongbae

Classifications

• H01M8/1004 Primary

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

• H01M12/08

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01M8/1032

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

• H01M8/103

  having nitrogen, e.g. sulfonated polybenzimidazoles [S-PBI], polybenzimidazoles with phosphoric acid, sulfonated polyamides [S-PA] or sulfonated polyphosphazenes [S-PPh] · CPC title

• C08G61/12 Primary

  Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule · CPC title