Grafted functional groups on expanded tetrafluoroethylene (ePTFE) support for fuel cell and water transport membranes
Patent
·
OSTI ID:1340532
A method for forming a modified solid polymer includes a step of contacting a solid fluorinated polymer with a sodium sodium-naphthalenide solution to form a treated fluorinated solid polymer. The treated fluorinated solid polymer is contacted with carbon dioxide, sulfur dioxide, or sulfur trioxide to form a solid grafted fluorinated polymer. Characteristically, the grafted fluorinated polymer includes appended CO.sub.2H or SO.sub.2H or SO.sub.3H groups. The solid grafted fluorinated polymer is advantageously incorporated into a fuel cell as part of the ion-conducting membrane or a water transport membrane in a humidifier.
- Research Organization:
- GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0000470
- Assignee:
- GM GLOBAL TECHNOLOGY OPERATIONS LLC (Detroit, MI)
- Patent Number(s):
- 9,553,327
- Application Number:
- 14/586,132
- OSTI ID:
- 1340532
- Resource Relation:
- Patent File Date: 2014 Dec 30
- Country of Publication:
- United States
- Language:
- English
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