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Improving the power performance of urine-fed microbial fuel cells using PEDOT-PSS modified anodes

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  • Salar-Garcia, M.J.
  • Montilla, F.
  • Quijada, C.
  • Morallon, E.
  • Ieropoulos, I.

Abstract

The need for improving the energy harvesting from Microbial Fuel Cells (MFCs) has boosted the design of new materials in order to increase the power performance of this technology and facilitate its practical application. According to this approach, in this work different poly(3,4-ethylenedioxythiophene)-polystyrenesulfonate (PEDOT-PSS) modified electrodes have been synthesised and evaluated as anodes in urine-fed MFCs. The electrochemical synthesis of PEDOT-PSS was performed by potentiostatic step experiments from aqueous solution at a fixed potential of 1.80 V (vs. a reversible hydrogen electrode) for different times: 30, 60, 120 and 240 s. Compared with other methods, this technique allowed us not only to reduce the processing time of the electrodes but also better control of the chemical composition of the deposited polymer and therefore, obtain more efficient polymer films. All modified anodes outperformed the maximum power output by MFCs working with the bare carbon veil electrode but the maximum value was observed when MFCs were working with the PEDOT-PSS based anode obtained after 30 s of electropolymerisation (535.1 µW). This value was 24.3% higher than using the bare carbon veil electrode. Moreover, the functionality of the PEDOT-PSS anodes was reported over 90 days working in continuous mode.

Suggested Citation

  • Salar-Garcia, M.J. & Montilla, F. & Quijada, C. & Morallon, E. & Ieropoulos, I., 2020. "Improving the power performance of urine-fed microbial fuel cells using PEDOT-PSS modified anodes," Applied Energy, Elsevier, vol. 278(C).
    • Handle: RePEc:eee:appene:v:278:y:2020:i:c:s0306261920310400
    DOI: 10.1016/j.apenergy.2020.115528
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    References listed on IDEAS

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    1. Walter, Xavier Alexis & Stinchcombe, Andrew & Greenman, John & Ieropoulos, Ioannis, 2017. "Urine transduction to usable energy: A modular MFC approach for smartphone and remote system charging," Applied Energy, Elsevier, vol. 192(C), pages 575-581.
    2. Pandey, Prashant & Shinde, Vikas N. & Deopurkar, Rajendra L. & Kale, Sharad P. & Patil, Sunil A. & Pant, Deepak, 2016. "Recent advances in the use of different substrates in microbial fuel cells toward wastewater treatment and simultaneous energy recovery," Applied Energy, Elsevier, vol. 168(C), pages 706-723.
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    1. Mashkour, Mehrdad & Rahimnejad, Mostafa & Mashkour, Mahdi & Soavi, Francesca, 2021. "Increasing bioelectricity generation in microbial fuel cells by a high-performance cellulose-based membrane electrode assembly," Applied Energy, Elsevier, vol. 282(PA).

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