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Electrical properties of hydrous ruthenium dioxide in direct methanol fuel cells

  • Florida State University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

The electrical properties of hydrous ruthenium oxide (RuO 2.xH2O) have been investigated in a modified direct methanol fuel cell (DMFC). The configuration of the modified DMFC involves a RuO2.xH2O layer sandwiched between anode catalyst layer and membrane. The experiments on polarization curves and electrochemical impedance spectra of the modified DMFC have been carried out to obtain the ionic resistance and capacitance of the RuO2.xH2O layer. Further numerical simulation study based on an electrical circuit model indicates that the RuO2.xH2O layer in the modified DMFC is equivalent to a resistive-capacitive transmission line and functions similar to a capacitor in parallel with the anode electrode. The improvement in the dynamic response of the modified DMFC has been experimentally confirmed in square current pulse operating condition. Finally, a novel monolithic hybrid DMFC has been proposed and discussed. copyright The Electrochemical Society.

Original languageEnglish
Title of host publicationProton Exchange Membrane Fuel Cells V, In Honor of Supramaniam Srinivasan
PublisherElectrochemical Society Inc.
Pages305-314
Number of pages10
Edition6
ISBN (Electronic)1566774969
ISBN (Print)1566774969, 9781566774963
DOIs
StatePublished - 2006
Event208th Meeting of the Electrochemical Society - Los Angeles, CA, United States
Duration: Oct 16 2005Oct 21 2005

Publication series

NameECS Transactions
Number6
Volume1
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference208th Meeting of the Electrochemical Society
Country/TerritoryUnited States
CityLos Angeles, CA
Period10/16/0510/21/05

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