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Comparison between Nafion® and a Nafion® Zirconium Phosphate Nano-composite in Fuel Cell Applications

Titelangaben

Bauer, Felix ; Willert-Porada, Monika:
Comparison between Nafion® and a Nafion® Zirconium Phosphate Nano-composite in Fuel Cell Applications.
In: Fuel Cells. Bd. 6 (2006) Heft 3-4 . - S. 261-269.
ISSN 1615-6854
DOI: https://doi.org/10.1002/fuce.200500217

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

A comparative investigation of the electrical, mechanical, and chemical behaviour of zirconium phosphate-Nafion composite membranes and Nafion by means of ex-situ measurements, as well as with fuel cell operation, reveals a slight reduction of ionic conductivity, a significant improvement of mechanical stability, and increased water retention for the composite materials. The overall efficiency at 130 °C is increased during direct methanol fuel cell (DMFC) operation because the reduction in the ionic conductivity is overcompensated for by the decrease in methanol crossover. With H2 as the fuel, the slight reduction in overall efficiency corresponds to the decrease in ionic conductivity. The dimensional stability of the membrane and the membrane electrode assembly (MEA) is significantly improved for operating temperatures above 100 °C. A model for the microstructure-property relation for PFSA-Zr(HPO4)2·n H2O composite membranes is presented, based on the experimental results from membranes with varying filler contents and distributions, obtained through different synthesis routes. It is aimed at the improvement of water distribution in the membrane upon fuel cell operation.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Composite Membranes; Fuel Cell Operation; Layer phosphate; Mechanical Stability; Proton conductivity
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Ehemalige Professoren > Lehrstuhl Werkstoffverarbeitung - Univ.-Prof. Dr. Monika Willert-Porada
Profilfelder > Advanced Fields > Polymer- und Kolloidforschung
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Werkstoffverarbeitung
Profilfelder
Profilfelder > Advanced Fields
Fakultäten > Fakultät für Ingenieurwissenschaften > Ehemalige Professoren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 04 Mai 2015 12:53
Letzte Änderung: 04 Mai 2015 12:53
URI: https://eref.uni-bayreuth.de/id/eprint/11244