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

Winfield, Jonathan; Ieropoulos, Ioannis; Greenman, John

doi:10.1016/j.jbiotec.2010.08.072

Cited by 21 publications

(28 citation statements)

References 18 publications

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“…28) Nevertheless, it has been suggested that power overshoot is due to limited performance of the anode under sub-optimal conditions. 29) In addition, the increase in the operating temperature could also improve the diffusion coefficients of the substrates and protons, causing the decrease in internal resistance of the MFC and hence the improvement of MFC performance. 7,30,31) Thus, taken together, these results suggested that the catalytic activity of the anodic microorganisms was relatively limited at 75°C and improved with the increase in the operating temperature up to 95°C, but was inhibited at 98°C (in other words, it was optimal at 95°C).…”

Section: Effects Of the Operating Temperature On Mfc Performancementioning

confidence: 99%

Bioelectrochemical analysis of a hyperthermophilic microbial fuel cell generating electricity at temperatures above 80 °C

Fukushima

Maeda

et al. 2015

Bioscience, Biotechnology, and Biochemistry

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We examined whether a hyperthermophilic microbial fuel cell (MFC) would be technically feasible. Two-chamber MFC reactors were inoculated with subsurface microorganisms indigenous to formation water from a petroleum reservoir and were started up at operating temperature 80 °C. The MFC generated a maximum current of 1.3 mA 45 h after the inoculation. Performance of the MFC improved with an increase in the operating temperature; the best performance was achieved at 95 °C with the maximum power density of 165 mWm−2, which was approximately fourfold higher than that at 75 °C. Thus, to our knowledge, our study is the first to demonstrate generation of electricity in a hyperthermophilic MFC (operating temperature as high as 95 °C). Scanning electron microscopy showed that filamentous microbial cells were attached on the anode surface. The anodic microbial consortium showed limited phylogenetic diversity and primarily consisted of hyperthermophilic bacteria closely related to Caldanaerobacter subterraneus and Thermodesulfobacterium commune.

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Section: Effects Of the Operating Temperature On Mfc Performancementioning

confidence: 99%

Bioelectrochemical analysis of a hyperthermophilic microbial fuel cell generating electricity at temperatures above 80 °C

Fukushima

Maeda

et al. 2015

Bioscience, Biotechnology, and Biochemistry

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“…A power curve, on the other hand, presents the power (or power density) as a function of the current or current density 21 . The power density curve is very useful for determining the point of maximum power transfer in MFCs or conventional fuel cells 22 . Because of the low ionic conductivity of most substrate solutions, 23 ohmic resistance is very important in determining the point at which the maximum power is achieved for many MFCs 21 .…”

Section: Introductionmentioning

confidence: 99%

“…These losses are usually evaluated from different regions of the curves depending on their shapes. While activation losses appear in the first section, ohmic and mass transfer losses are manifested in the second and third (last) area of the polarization curve 22 …”

Section: Introductionmentioning

confidence: 99%

Polarization and power density trends of a soil‐based microbial fuel cell treated with human urine

et al. 2020

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Microbial fuel cells (MFCs) are bio-electrochemical devices that use microbial metabolic processes to convert organic substances into electricity with high efficiency. In this study, the performance of a soil-based MFC using urine as a substrate was assessed using polarization and power density curves. A singlechamber, membrane-less MFC with a carbon-felt air cathode and a carbon-felt anode fully buried in biologically active soil was constructed to examine the impact of urine treatment on the performance of the MFC. The peak power of the urine-treated MFC was 124.16 mW/m 2 and was obtained 24 hours after the first urine addition; a control MFC showed a value of 65.40 mW/m 2 in the same period. The treated MFC produced an average power of 70.75 mW/m 2 up to 21 days after the initial urine addition; the control MFC gave an average value of 4.508 mW/m 2 over the same period. The average internal resistances of the treated MFC and the control MFC obtained after the initial treatment were 269.94 and 1627.89 Ω, respectively. This study demonstrates the potential of human urine to reduce internal losses in soil MFCs and to provide stable power densities across various external resistors. These results are propitious for future advancements in soil MFCs for power generation utilizing human urine (a readily available source of nutrients) as a substrate.

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“…However, electro-active biofilms developed in such a potentialadaptive way are generally fragile, lacking the ability to adapt to higher currents. For example, in MFC polarization measurements, currents are often observed to sharply decrease in high current range in some MFCs [21][22][23]. This lack of adaptation to higher currents in bio-anodes would enable MFCs to exhibit unusual electrochemical behaviors or to fail to function in higher current ranges.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Intermittent Limiting Anodic Current Stimulation on the Electro Activity of Anodic Biofilms

Zhang¹,

Yu²,

Zhang³

et al. 2017

J Adv Chem Eng

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Journal of Advanced Chemical EngineeringZhang et al., J Adv Chem Eng 2017, 7:1 DOI: 10.4172/2090 Volume AbstractElectro active biofilms is key components of bio electrochemical systems. Anodic biofilms formed by a potentialadaptive way (i.e., operation with constant external resistance or poised anode potentials) generally lack the ability to adapt to limiting currents. In the present study, a strategy based on intermittent limiting anodic current application was first employed to directly stimulate the current-adaptive growth of anodic biofilms, aiming to obtain electro active biofilms with high current adaptation. Series of intermittent limiting anodic current stimulations exhibit effectiveness for enhancing the electro-activity of anodic biofilms. Porous thick anodic biofilms with less extracellular polymeric substance production could be obtained by series of intermittent limiting anodic currents application from thin biofilms, generating robust anodic biofilms. The high stable power output of 4.35 W m −2 could be achieved with robust anodic biofilms at high working current of 9.5 A m −2 . The present study show that current is a crucial factor influencing the performance of electro-active biofilms, suggesting that an alternative current-adaptive method could be developed for the growth of electro active biofilms with high performance.

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

Cited by 21 publications

References 18 publications

Bioelectrochemical analysis of a hyperthermophilic microbial fuel cell generating electricity at temperatures above 80 °C

Bioelectrochemical analysis of a hyperthermophilic microbial fuel cell generating electricity at temperatures above 80 °C

Polarization and power density trends of a soil‐based microbial fuel cell treated with human urine

The Effect of Intermittent Limiting Anodic Current Stimulation on the Electro Activity of Anodic Biofilms

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