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Characterization of Anion Exchange Ionomers in Hybrid Polymer Electrolyte Fuel Cells
Author(s) -
Ünlü Murat,
Zhou Junfeng,
AnestisRichard Irene,
Kohl Paul A.
Publication year - 2010
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201000239
Subject(s) - dielectric spectroscopy , electrolyte , electrode , anode , cathode , materials science , cyclic voltammetry , proton exchange membrane fuel cell , electrochemistry , ionomer , membrane electrode assembly , chemical engineering , membrane , polymer , chemistry , composite material , copolymer , biochemistry , engineering
Anion exchange ionomers (AEI) synthesized here were characterized by use of a novel fuel cell configuration. The new analysis method involves assembling the AEI electrode of interest as the cathode in a hybrid, acid/alkaline, fuel cell configuration. The hybrid cell includes a conventional proton conducting anode/membrane half‐cell along with the anionic conductor of interest at the cathode. Electrochemical impedance spectroscopy and voltammetry were used to evaluate the performance of the hybrid AEI‐containing fuel cell with H 2 and O 2 . In particular, the AEI electrode response in impedance spectroscopy was easily identified because the contributions from other components are largely minimized in the presented hybrid cell configuration. The properties of ionomers used in the AEI electrode were shown to have a substantial effect on the electrode performance. Low catalyst utilization, due to high water uptake and low conductivity, was identified as the major causes of poor performance in AEI electrodes.