Evaluation of Electrode and Solution Area-Based Resistances Enables Quantitative Comparisons of Factors Impacting Microbial Fuel Cell Performance

Ruggero Rossi, Benjamin P. Cario, Carlo Santoro, Wulin Yang, Pascal E. Saikaly, Bruce Ernest Logan

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Direct comparisons of microbial fuel cells based on maximum power densities are hindered by different reactor and electrode sizes, solution conductivities, and materials. We propose an alternative method here, the electrode potential slope (EPS) analysis, to enable quantitative comparisons based on anode and cathode area-based resistances and operating potentials. Using EPS analysis, the brush anode resistance (R An = 10.6 ± 0.5 m m 2 ) was shown to be 28% lower than the resistance of a 70% porosity diffusion layer (70% DL) cathode (R Cat = 14.8 ± 0.9 m m 2 ) and 24% lower than the solution resistance (R = 14 m m 2 ) (acetate in a 50 mM phosphate buffer solution). Using a less porous cathode (30% DL) did not impact the cathode resistance but did reduce the cathode performance due to a lower operating potential. With low-conductivity domestic wastewater (R = 87 m m 2 ), both electrodes had higher resistances [R An = 75 ± 9 m m 2 , and R Cat = 54 ± 7 m m 2 (70% DL)]. Our analysis of the literature using EPS analysis shows how electrode resistances can easily be quantified to compare system performance when the electrode distances are changed or the sizes of the electrodes are different.

Original languageEnglish (US)
Pages (from-to)3977-3986
Number of pages10
JournalEnvironmental Science and Technology
Volume53
Issue number7
DOIs
StatePublished - Apr 2 2019

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Microbial fuel cells
fuel cell
electrode
Electrodes
Cathodes
Anodes
conductivity
Porosity
porosity
evaluation
comparison
Brushes
acetate
Buffers
Acetates
Wastewater
Phosphates
phosphate
wastewater
analysis

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Rossi, Ruggero ; Cario, Benjamin P. ; Santoro, Carlo ; Yang, Wulin ; Saikaly, Pascal E. ; Logan, Bruce Ernest. / Evaluation of Electrode and Solution Area-Based Resistances Enables Quantitative Comparisons of Factors Impacting Microbial Fuel Cell Performance. In: Environmental Science and Technology. 2019 ; Vol. 53, No. 7. pp. 3977-3986.
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Evaluation of Electrode and Solution Area-Based Resistances Enables Quantitative Comparisons of Factors Impacting Microbial Fuel Cell Performance. / Rossi, Ruggero; Cario, Benjamin P.; Santoro, Carlo; Yang, Wulin; Saikaly, Pascal E.; Logan, Bruce Ernest.

In: Environmental Science and Technology, Vol. 53, No. 7, 02.04.2019, p. 3977-3986.

Research output: Contribution to journalArticle

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