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Journal of Applied Electrochemistry

, Volume 43, Issue 7, pp 629–636 | Cite as

Dual-chambered bio-batteries using immobilized mediator electrodes

  • A. B. Hoffman
  • S. Suresh
  • R. W. Evitts
  • G. F. Kennell
  • J. M. Godwin
Original Paper

Abstract

Methylene blue was immobilized on 304L stainless steel to investigate a potential cost-effective, durable, and high performance composite electrode for use with microbial applications, such as bio-batteries and microbial fuel cells. The composite electrodes were tested in dual-chamber bio-batteries with pure cultures of Escherichia coli K-12 or Shewanella oneidensis MR-1 and the results were compared to those obtained using bare graphite electrodes. The maximum power generated using the composite electrodes was 39.35 mW m−2 in bio-batteries using E. coli K-12, and 60.05 mW m−2 in bio-batteries using S. oneidensis MR-1. Compared to graphite electrodes, the bio-batteries using composite electrodes showed a 6- and 2.5-fold increase in the maximum power density, using pure cultures of E. coli K-12 and S. oneidensis MR-1, respectively. The composite electrodes did not inhibit bacterial growth in the bio-batteries and were shown to improve performance (both in terms of power output and current density) over conventional graphite electrodes.

Keywords

Bio-battery Immobilized mediator electrodes Stainless steel electrodes Polarization Microbial 

Notes

Acknowledgments

The authors gratefully acknowledge financial support from the Natural Science and Engineering Research Council of Canada (NSERC).

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • A. B. Hoffman
    • 1
  • S. Suresh
    • 1
  • R. W. Evitts
    • 1
  • G. F. Kennell
    • 1
  • J. M. Godwin
    • 1
  1. 1.Department of Chemical and Biological EngineeringUniversity of SaskatchewanSaskatoonCanada

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