Electrochemical impedance spectroscopy studies on microbial fuel cells

Ramaraja P. Ramasamy, Zhiyong Ren, Matthew Mench, John Regan

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

1 Scopus citations

Abstract

Recent design improvements helped increase the power densities of Microbial Fuel Cells (MFCs) by orders of magnitude by decreasing the internal ohmic resistance. With the ohmic resistance of the MFC systems no longer a dominant issue, identification of other intrinsic resistances is the need of the hour. Electrochemical Impedance Spectroscopy (EIS) is a useful tool to delineate the individual contributions from different resistances to the overall cell impedance. Preliminary EIS experiments were conducted with acetate fed two-chamber MFC inoculated with Geobacter Sulfurreducens and using a ferricyanide catholyte. Results showed that the anode played a dominant role in limiting the kinetics of the bio-electrochemical reaction, thereby contributing to the majority of the polarization loss. Based on the equivalent electrical circuit fitting of the EIS data, parameters such as charge transfer resistance, membrane resistance and exchange current density have been estimated for the first time for the case of MFCs.

Original languageEnglish (US)
Title of host publication234th ACS National Meeting, Abstracts of Scientific Papers
StatePublished - Dec 31 2007
Externally publishedYes
Event234th ACS National Meeting - Boston, MA, United States
Duration: Aug 19 2007Aug 23 2007

Publication series

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

Other

Other234th ACS National Meeting
CountryUnited States
CityBoston, MA
Period8/19/078/23/07

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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    Ramasamy, R. P., Ren, Z., Mench, M., & Regan, J. (2007). Electrochemical impedance spectroscopy studies on microbial fuel cells. In 234th ACS National Meeting, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).