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US 2026/0128339 A1Published application
Electrochemical membrane
AssigneeW. L. Gore & Associates, Inc.
InventorsJoshua Bartels, Navya Jagarlamudi
Life of this patent
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Abstract
This disclosure relates to polymer electrolyte membranes, and in particular, to a composite membrane having at least two reinforcing layers comprising a microporous polymer structure and a surprisingly high resistance to piercing. This disclosure also relates to composite membrane-assemblies and electrochemical devices comprising the composite membranes of the disclosure, and to methods of manufacture of the composite membranes.
Claims20
A composite membrane for an electrochemical device, comprising:
- a) at least two reinforcing layers, each of said at least two reinforcing layers comprising a microporous polymer structure;
- and
- b) an ion exchange material (IEM) at least partially imbibed within the microporous polymer structure of the at least two reinforcing layers and rendering the microporous polymer structure occlusive;
- wherein the normalized total content of microporous polymer structure within the composite membrane is at least 3.0 μm based on the total area of the composite membrane,
- wherein the normalized total content of the microporous polymer structure within the composite membrane is calculated with the following formula:
- [
-
- ∑
- M
- mps
-
- 1
-
- in
-
- each
-
- reinforcing
-
- layer
- /
- A
- composite
-
- membrane
- (
- g
- ·
- m
- -
- 2
- )
- matrix
-
- skeletal
-
- density
- mps
-
- 1
- (
- g
- ·
- cm
- -
- 3
- )
- +
- ∑
- M
- mps
-
- 2
-
- in
-
- each
-
- reinforcing
-
- layer
- /
- A
- composite
-
- membrane
- (
- g
- ·
- m
- -
- 2
- )
- matrix
-
- skeletal
-
- density
- mps
-
- 2
- (
- g
- ·
- cm
- -
- 3
- )
- +
- ...
- +
- ∑
- M
- mps
-
- N
-
- in
-
- each
-
- reinforcing
-
- layer
- /
- A
- composite
-
- membrane
- (
- g
- ·
- m
- -
- 2
- )
- matrix
-
- skeletal
-
- density
- mps
-
- N
- (
- g
- ·
- cm
- -
- 3
- )
- ]
- ·
- 10
- -
- 6
-
- m
- 3
- cm
- 3
- wherein mps1 is microporous polymer structure 1, mps2 is microporous polymer structure 2, mpsN is microporous polymer structure N (if there are N different types of microporous polymer structures within the composite membrane).
139 more elements
Dependencies are inferred from the claim text.