The overshoot phenomenon as a function of internal resistance in microbial fuel cells

Winfield, Jonathan; Ieropoulos, Ioannis; Greenman, John; Dennis, Julian

doi:10.1016/j.bioelechem.2011.01.001

Cited by 117 publications

(55 citation statements)

References 22 publications

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“…) was observed at cycle 1, mainly ascribed to the occurrence of a power overshoot probably due to ions and substrate limitations [24]. Similarly, TS (Fig.…”

Section: Polarization Curves As a Function Of Timementioning

confidence: 92%

Electricity generation and bivalent copper reduction as a function of operation time and cathode electrode material in microbial fuel cells

Huang

Quan

et al. 2016

Journal of Power Sources

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“…) was observed at cycle 1, mainly ascribed to the occurrence of a power overshoot probably due to ions and substrate limitations [24]. Similarly, TS (Fig.…”

Section: Polarization Curves As a Function Of Timementioning

confidence: 92%

Electricity generation and bivalent copper reduction as a function of operation time and cathode electrode material in microbial fuel cells

Huang

Quan

et al. 2016

Journal of Power Sources

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“…However, during discharge tests in MFCs, an unexpected phenomenon referred to as “power overshoot” commonly occurs . Theoretically, the voltage and power (or power density) curves should vary directly with the current (or current density) during a discharge test .…”

Section: Introductionmentioning

confidence: 99%

Elimination of Power Overshoot at Bioanode through Assistance Current in Microbial Fuel Cells

Kim

Chang

2017

ChemSusChem

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The power overshoot generated by electron depletion in microbial fuel cells (MFCs) was characterized in this study. Various causes of power overshoot, identified in previous studies, are discussed in terms of their plausible contributions to electron depletion. We found that power overshoot occurred if the anodic overpotential generated by electron depletion exceeded the cathodic overpotential. The introduction of assistance current from anode connections, which ameliorated the electron depletion in the MFCs, immediately eliminated the power overshoot. As a result, if the electron production at the anode exceeded electron reduction at the cathode, a power overshoot was not generated. The results revealed that introducing assistance current supplied from an additional anode to the limited anode eliminated power overshoot. The power overshoot is not generated by kinetic limitation at the cathode; it is only generated by the kinetic limitation at the anode. The mechanism underlying power overshoot should be considered in the design of MFCs to improve reliability, particularly in scaled-up plant applications. The proposed technique is more practical than previously proposed methods.

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“…As the current densities increase, the IE curves showed diffusion limitations going into overshoot conditions [44]. Particularly, the OH-MFCs showed mass transfer control at roughly 70 µA cm −2 while the COOH−MFCs showed diffusion limitations at roughly 125 µA cm −2 and the N(CH 3 ) 3 + −MFC was limited by mass transfer at roughly 200 µA cm −2 .…”

Section: Resultsmentioning

confidence: 99%

Influence of anode surface chemistry on microbial fuel cell operation

Santoro

Babanova

Artyushkova

et al. 2015

Bioelectrochemistry

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Self-assembled monolayers (SAMs) modified gold anodes are used in single chamber microbial fuel cells (SCMFC) for organics removal and electricity generation. Hydrophilic (−N(CH3)3+, −OH, −COOH) and hydrophobic (−CH3) SAMs are examined for their effect on bacterial attachment, current and power output. The different substratum chemistry affects both the current and power output and the community composition of the electrochemically active biofilm formed. Of the four SAM-modified anode tested, −N(CH3)3+ results in shortest start up time, highest single electrode polarization and power density, followed by −OH and –COOH SAMs. Hydrophobic SAM decreases bacteria attachment and anodes performance in comparison to hydrophilic SAMs. Electron transfer rate is faster on the N(CH3)3+-surface than on other surfaces, and correlates with a high abundance of δ-Proteobacteria, including electrochemically active species. A consortium of Clostridia and δ-Proteobacteria is found on all the anode surfaces, suggesting a synergistic cooperation under anodic conditions.

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The overshoot phenomenon as a function of internal resistance in microbial fuel cells

Cited by 117 publications

References 22 publications

Electricity generation and bivalent copper reduction as a function of operation time and cathode electrode material in microbial fuel cells

Electricity generation and bivalent copper reduction as a function of operation time and cathode electrode material in microbial fuel cells

Elimination of Power Overshoot at Bioanode through Assistance Current in Microbial Fuel Cells

Influence of anode surface chemistry on microbial fuel cell operation

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