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Title: Performance of differently cross-linked, partially fluorinated proton exchange membranes in polymer electrolyte fuel cells

Abstract

A series of differently cross-linked FEP-g-polystyrene proton exchange membranes has been synthesized by the preirradiation grafting method [FEP: poly(tetrafluoroethylene-co-hexafluoropropylene)]. Divinylbenzene (DVB) and/or triallyl cyanurate (TAC) were used as cross-linkers in the membranes. It was found that the physical properties of the membranes, such as water-uptake and specific resistance, are strongly influenced by the nature of the cross-linker. Generally it can be stated that DVB decreases water-uptake and increases specific resistance; on the other hand TAC increases swelling and decreases specific resistance to values as low as 5.0 {Omega} cm at 60 C. The membranes were tested in H{sub 2}/O{sub 2} fuel cells for stability and performance. It was found that thick (170 {micro}m) DVB cross-linked membranes showed stable operation for 1,400 h at temperatures up to 80 C. The highest power density in the fuel cell was found for the DVB and TAC double-cross-linked membrane; it exceeded the value of a cell with a Nafion{reg_sign} 117 membrane by more than 60%.

Authors:
; ; ;  [1]
  1. Paul Scherrer Inst., Villigen (Switzerland). Lab. for Energy and Process Technology
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
122732
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 142; Journal Issue: 9; Other Information: PBD: Sep 1995
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; SOLID ELECTROLYTE FUEL CELLS; MEMBRANES; PERFORMANCE; HYDROGEN FUEL CELLS; CROSS-LINKING; POLYSTYRENE; POLYTETRAFLUOROETHYLENE; CYANURATES; ELECTRIC-POWERED VEHICLES

Citation Formats

Buechi, F N, Gupta, B, Haas, O, and Scherer, G G. Performance of differently cross-linked, partially fluorinated proton exchange membranes in polymer electrolyte fuel cells. United States: N. p., 1995. Web. doi:10.1149/1.2048683.
Buechi, F N, Gupta, B, Haas, O, & Scherer, G G. Performance of differently cross-linked, partially fluorinated proton exchange membranes in polymer electrolyte fuel cells. United States. https://doi.org/10.1149/1.2048683
Buechi, F N, Gupta, B, Haas, O, and Scherer, G G. Fri . "Performance of differently cross-linked, partially fluorinated proton exchange membranes in polymer electrolyte fuel cells". United States. https://doi.org/10.1149/1.2048683.
@article{osti_122732,
title = {Performance of differently cross-linked, partially fluorinated proton exchange membranes in polymer electrolyte fuel cells},
author = {Buechi, F N and Gupta, B and Haas, O and Scherer, G G},
abstractNote = {A series of differently cross-linked FEP-g-polystyrene proton exchange membranes has been synthesized by the preirradiation grafting method [FEP: poly(tetrafluoroethylene-co-hexafluoropropylene)]. Divinylbenzene (DVB) and/or triallyl cyanurate (TAC) were used as cross-linkers in the membranes. It was found that the physical properties of the membranes, such as water-uptake and specific resistance, are strongly influenced by the nature of the cross-linker. Generally it can be stated that DVB decreases water-uptake and increases specific resistance; on the other hand TAC increases swelling and decreases specific resistance to values as low as 5.0 {Omega} cm at 60 C. The membranes were tested in H{sub 2}/O{sub 2} fuel cells for stability and performance. It was found that thick (170 {micro}m) DVB cross-linked membranes showed stable operation for 1,400 h at temperatures up to 80 C. The highest power density in the fuel cell was found for the DVB and TAC double-cross-linked membrane; it exceeded the value of a cell with a Nafion{reg_sign} 117 membrane by more than 60%.},
doi = {10.1149/1.2048683},
url = {https://www.osti.gov/biblio/122732}, journal = {Journal of the Electrochemical Society},
number = 9,
volume = 142,
place = {United States},
year = {1995},
month = {9}
}