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Enhanced performance of microbial fuel cell with polyaniline/sodium alginate/carbon brush hydrogel bioanode and removal of COD

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  • Wang, Yuyang
  • Wen, Qing
  • Chen, Ye
  • Zheng, Hongtao
  • Wang, Shuang

Abstract

The use of capacitive and biocompatible anode materials is important for constructing microbial fuel cells (MFCs). Here, self-supporting polyaniline-sodium alginate/carbon brush (PANI-SA/CB) hydrogel was prepared by in situ polymerization as an MFC anode. The easily fabricated PANI–SA-conducting hydrogels showed great potential as electrode materials for MFC anodes. The maximum power density of MFCs equipped with PANI-SA/CB hydrogel bioanodes was 515 mW/m2, which was 1.38 times higher than that of the blank CB bioanode (373 mW/m2). During the charging-discharging experiment with 30 min of charging and 60 min of discharging, the stored charge Qs of the PANI-SA/CB hydrogel bioanode was 1984.42C/m2, 2.98 times higher than that of the blank CB bioanode (665.88C/m2). The robustness of our findings stems from the excellent capacitive properties of PANI-SA. These findings suggest that anode materials, such as the PANI-SA/CB hydrogel anode in MFCs, can function as biocapacitors, as they can simultaneously store electrons generated from microbial oxidation of substrates and release the accumulated charge.

Suggested Citation

  • Wang, Yuyang & Wen, Qing & Chen, Ye & Zheng, Hongtao & Wang, Shuang, 2020. "Enhanced performance of microbial fuel cell with polyaniline/sodium alginate/carbon brush hydrogel bioanode and removal of COD," Energy, Elsevier, vol. 202(C).
    • Handle: RePEc:eee:energy:v:202:y:2020:i:c:s0360544220308872
    DOI: 10.1016/j.energy.2020.117780
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    References listed on IDEAS

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    1. Liang, Peng & Zhang, Changyong & Jiang, Yong & Bian, Yanhong & Zhang, Helan & Sun, Xueliang & Yang, Xufei & Zhang, Xiaoyuan & Huang, Xia, 2017. "Performance enhancement of microbial fuel cell by applying transient-state regulation," Applied Energy, Elsevier, vol. 185(P1), pages 582-588.
    2. Christwardana, Marcelinus & Frattini, Domenico & Accardo, Grazia & Yoon, Sung Pil & Kwon, Yongchai, 2018. "Early-stage performance evaluation of flowing microbial fuel cells using chemically treated carbon felt and yeast biocatalyst," Applied Energy, Elsevier, vol. 222(C), pages 369-382.
    3. Hidalgo, Diana & Tommasi, Tonia & Bocchini, Sergio & Chiolerio, Alessandro & Chiodoni, Angelica & Mazzarino, Italo & Ruggeri, Bernardo, 2016. "Surface modification of commercial carbon felt used as anode for Microbial Fuel Cells," Energy, Elsevier, vol. 99(C), pages 193-201.
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    Cited by:

    1. de Ramón-Fernández, A. & Salar-García, M.J. & Ruiz Fernández, D. & Greenman, J. & Ieropoulos, I.A., 2020. "Evaluation of artificial neural network algorithms for predicting the effect of the urine flow rate on the power performance of microbial fuel cells," Energy, Elsevier, vol. 213(C).
    2. Yang, Wei & Li, Jun & Fu, Qian & Zhang, Liang & Wei, Zidong & Liao, Qiang & Zhu, Xun, 2021. "Minimizing mass transfer losses in microbial fuel cells: Theories, progresses and prospectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 136(C).
    3. Shahid, Kanwal & Ramasamy, Deepika Lakshmi & Haapasaari, Sampo & Sillanpää, Mika & Pihlajamäki, Arto, 2021. "Stainless steel and carbon brushes as high-performance anodes for energy production and nutrient recovery using the microbial nutrient recovery system," Energy, Elsevier, vol. 233(C).

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