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Highly Durable Proton Exchange Membranes for Low Temperature Fuel Cells.
- Source :
-
Journal of Physical Chemistry B . Aug2007, Vol. 111 Issue 30, p8684-8690. 7p. - Publication Year :
- 2007
-
Abstract
- A novel method has been proposed to fabricate Nafion/poly(tetrafluoroethylene) (PTFE) composite proton exchange membranes (PEMs) with high durability and high chemical stability. In this method, Nafion ionomers were first converted into the Naform, they were then fixed on PTFE frame micropores, and then the polymer was heat-treated at 270 °C. The chemical stability tests of the novel composite PEMs by Fenton's reagent demonstrate the significant improvement in the chemical durability. The Nafion/PTFE composite PEMs also show an excellent physical stability, and its RH-generated stress is 0.6 MPa at 25 RH% and 90 °C, substantially smaller than 3.1 MPa for pure Nafion membrane under the same conditions. In an in situ accelerating RH cyclic experiment, the degradation in the open circuit voltage (OCV) of the fuel cell assembled with the novel composite PEMs is 3.3 mV/h, significantly lower than 13.2 mV/h for a fuel cell assembled with the commercial Nafion membrane. [ABSTRACT FROM AUTHOR]
- Subjects :
- *COLD (Temperature)
*ELECTRIC power production
*ENERGY conversion
*ENERGY transfer
Subjects
Details
- Language :
- English
- ISSN :
- 15206106
- Volume :
- 111
- Issue :
- 30
- Database :
- Academic Search Index
- Journal :
- Journal of Physical Chemistry B
- Publication Type :
- Academic Journal
- Accession number :
- 26089107
- Full Text :
- https://doi.org/10.1021/jp073136t