Analysis of palladium based anode electrode using electrochemical impedance spectra in direct formic acid fuel cells

Su Ha, Won Suk Jung, Jonghee Han

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we used the electrochemical impedance spectra to evaluate the anode performance of direct formic acid fuel cell (DFAFC), and how its anode charge transfer resistance (Ranode,ct) and electrolyte resistance (Rele) are affected by various cell operating parameters. These parameters that we have investigated in this study include the anode overpotentials, cell operation times, formic acid feed concentrations and cell temperatures. The anode impedance spectra demonstrated that the Ranode,ct and Rele are low for the DFAFC using 5M formic acid feed concentration, which leads to its high power density output of 250 mW/cm2 at 0.35 V and 30°C. This high performance of the DFAFC shows that it has a great potential for portable power applications. The Ranode,ct increases gradually as either the cell operation time increases or the formic acid feed concentration is raised from 10M to 15M, which leads to deactivations of the anode and the overall cell performances. However, these deactivation processes are reversible and the cell performance can be easily reactivated.

Original languageEnglish
Title of host publication234th ACS National Meeting, Abstracts of Scientific Papers
Publication statusPublished - 2007
Event234th ACS National Meeting - Boston, MA, United States
Duration: 2007 Aug 192007 Aug 23

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other234th ACS National Meeting
CountryUnited States
CityBoston, MA
Period07/8/1907/8/23

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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    Ha, S., Jung, W. S., & Han, J. (2007). Analysis of palladium based anode electrode using electrochemical impedance spectra in direct formic acid fuel cells. In 234th ACS National Meeting, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).