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Fabrication and characterization of PFSI/ePTFE composite proton exchange membranes of polymer electrolyte fuel cells

Version 2 2024-06-18, 08:20
Version 1 2018-05-07, 15:27
journal contribution
posted on 2024-06-18, 08:20 authored by H Tang, M Pan, SP Jiang, X Wang, Y Ruan
PFSI/ePTFE composite proton exchange membranes were fabricated by impregnating perfluorosulfonic acid resin (PFSI resin, Nafion) into chemically modified expanded PTFE (ePTFE) matrix. Chemical modification of sodium–naphthalene treatment and N-methylol acrylamide (NMA) grafting decreased the contact angle of the as-received ePTFE from 125 ± 0.5° to 67 ± 0.5°, effectively converting the as-received hydrophobic ePTFE to a hydrophilic ePTFE matrix. The composite membrane fabricated with the hydrophilic ePTFE have higher impregnated PFSI loading, much lower porosity and better PTFE/PFSI interface contact, as compared to the composite membranes with the as-received ePTFE. This leads to much lower gas permeability and significantly improves the durability under an accelerated dry/wet cycle test. The fuel cell made from the PFSI/ePTFE composite membranes with hydrophilic ePTFE showed superior performance as compared to that with the composite membrane made from the as-received ePTFE and Nafion 211 membrane.

History

Journal

Electrochimica Acta

Volume

52

Pagination

5304-5311

Location

Amsterdam, The Netherlands

ISSN

0013-4686

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2007, Elsevier

Issue

16

Publisher

Elsevier

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