Journal Article10.1021/ES062644Y
Graphite Fiber Brush Anodes for Increased Power Production in Air-Cathode Microbial Fuel Cells
1.2K
TL;DR: Findings show that brush anodes that have high surface areas and a porous structure can produce high power densities, and therefore have qualities that make them ideal for scaling up MFC systems.
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Abstract: To efficiently generate electricity using bacteria in microbial fuel cells (MFCs), highly conductive noncorrosive materials are needed that have a high specific surface area (surface area per volume) and an open structure to avoid biofouling. Graphite brush anodes, consisting of graphite fibers wound around a conductive, but noncorrosive metal core, were examined for power production in cube (C-MFC) and bottle (B-MFC) air-cathode MFCs. Power production in C-MFCs containing brush electrodes at 9600 m2/m3 reactor volume reached a maximum power density of 2400 mW/m2 (normalized to the cathode projected surface area), or 73 W/m3 based on liquid volume, with a maximum Coulombic efficiency (CE) of 60%. This power density, normalized by cathode projected area, is the highest value yet achieved by an air-cathode system. The increased power resulted from a reduction in internal resistance from 31 to 8 Ω. Brush electrodes (4200 m2/m3) were also tested in B-MFCs, consisting of a laboratory media bottle modified to h...
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TL;DR: A review of the different materials and methods used to construct MFCs, techniques used to analyze system performance, and recommendations on what information to include in MFC studies and the most useful ways to present results are provided.
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Novel mode of microbial energy metabolism: organic carbon oxidation coupled to dissimilatory reduction of iron or manganese.
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Microbial fuel cells: novel biotechnology for energy generation
Korneel Rabaey,Willy Verstraete +1 more
TL;DR: How bacteria use an anode as an electron acceptor and to what extent they generate electrical output is discussed and the MFC technology is evaluated relative to current alternatives for energy generation.
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Electricity generation using an air-cathode single chamber microbial fuel cell in the presence and absence of a proton exchange membrane.
Hong Liu,Bruce E. Logan +1 more
TL;DR: An analysis based on available anode surface area and maximum bacterial growth rates suggests that mediatorless MFCs may have an upper order-of-magnitude limit in power density of 10(3) mW/m2.
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Electricity generation by direct oxidation of glucose in mediatorless microbial fuel cells
TL;DR: A novel microorganism is reported on, Rhodoferax ferrireducens, that can oxidize glucose to CO2 and quantitatively transfer electrons to graphite electrodes without the need for an electron-shuttling mediator, which results in stable, long-term power production.
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