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Characterization and Fuel Cell Testing of Radiation-Grafted Psi Membranes

Published online by Cambridge University Press:  10 February 2011

H.-P. Brack ,
M. M. Koebel ,
A. Tsukada ,
J. Huslage ,
F. Buechi ,
F. Geiger ,
M Rota  and
G. G. Scherer
H.-P. Brack
Affiliation:
Electrochemistry Section, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
M. M. Koebel
Affiliation:
Electrochemistry Section, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
A. Tsukada
Affiliation:
Electrochemistry Section, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
J. Huslage
Affiliation:
Electrochemistry Section, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
F. Buechi
Affiliation:
Electrochemistry Section, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
F. Geiger
Affiliation:
Electrochemistry Section, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
M Rota
Affiliation:
Electrochemistry Section, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
G. G. Scherer
Affiliation:
Electrochemistry Section, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
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Abstract

We have demonstrated earlier the useful performance of our PSI radiation-grafted membranes in terms of the current-voltage characteristics of 30 cm2 active area fuel cells containing these membranes and their long-term testing over 6,000 h at 60 °C. We report here on testing of PSI radiation-grafted membranes in these fuel cells at 80 °C and in short stacks comprised of two or four 100 cm2 active area cells. The in-situ degradation of membranes has been investigated by characterizing membranes both before testing in fuel cells and post-mortem after testing in fuel cells. Characterization was accomplished by means of ion-exchange capacity and infrared and Raman spectroscopic measurements. In addition, a rapid screening method for our ex-situ testing of the oxidative stability of proton-conducting membranes was developed in this work. Comparison of the initial screening test results concerning the oxidative stability of some perfluorinated, partially-fluorinated, and non-fluorinated membranes compare well qualitatively with the relative stability of these same membranes during their long-term testing in fuel cells.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 575: Symposium CC – New Materials for Batteries & Fuel Cells , 1999 , 259
Copyright
Copyright © Materials Research Society 2000

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References

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