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    Power generation using carbon mesh cathodes with different diffusion layers in microbial fuel cells

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    Type
    Article
    Authors
    Luo, Yong
    Zhang, Fang cc
    Wei, Bin
    Liu, Guangli
    Zhang, Renduo
    Logan, Bruce E.
    KAUST Grant Number
    KUS-I1-003-13
    Date
    2011-11
    Permanent link to this record
    http://hdl.handle.net/10754/599350
    
    Metadata
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    Abstract
    An inexpensive carbon material, carbon mesh, was examined to replace the more expensive carbon cloth usually used to make cathodes in air-cathode microbial fuel cells (MFCs). Three different diffusion layers were tested using carbon mesh: poly(dimethylsiloxane) (PDMS), polytetrafluoroethylene (PTFE), and Goretex cloth. Carbon mesh with a mixture of PDMS and carbon black as a diffusion layer produced a maximum power density of 1355 ± 62 mW m -2 (normalized to the projected cathode area), which was similar to that obtained with a carbon cloth cathode (1390 ± 72 mW m-2). Carbon mesh with a PTFE diffusion layer produced only a slightly lower (6.6%) maximum power density (1303 ± 48 mW m-2). The Coulombic efficiencies were a function of current density, with the highest value for the carbon mesh and PDMS (79%) larger than that for carbon cloth (63%). The cost of the carbon mesh cathode with PDMS/Carbon or PTFE (excluding catalyst and binder costs) is only 2.5% of the cost of the carbon cloth cathode. These results show that low cost carbon materials such as carbon mesh can be used as the cathode in an MFC without reducing the performance compared to more expensive carbon cloth. © 2011 Elsevier B.V.
    Citation
    Luo Y, Zhang F, Wei B, Liu G, Zhang R, et al. (2011) Power generation using carbon mesh cathodes with different diffusion layers in microbial fuel cells. Journal of Power Sources 196: 9317–9321. Available: http://dx.doi.org/10.1016/j.jpowsour.2011.07.077.
    Sponsors
    We gratefully acknowledge help with materials and suggestions by David Jones, Dr. Yiying Hong, Dr. John Pisciotta, Dan Sun and Dr. Justin Tokash. This work was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST), and a scholarship from the China Scholarship Council (CSC).
    Publisher
    Elsevier BV
    Journal
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2011.07.077
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jpowsour.2011.07.077
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