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<p>The effect of hydrophobicity of the gas diffusion layer on the performance of a single-chamber microbial fuel cell was investigated. The R4 (3:1) reactor showed the best performance with a maximum power density of 1431 ± 80.3&#xa0;mW m<sup>−2</sup> and a coulombic efficiency of 45%. Scanning electron microscopy revealed that the gap between carbon black particles increased with decreasing PTFE ratio. Electrochemical analysis showed that the activated carbon/stainless-steel mesh/(CB/PTFE) electrode performed the best with the highest current density of 8.09&#xa0;A m<sup>−2</sup>. High-performance recovery (88%) of the contaminated electrode was achieved using lysozyme (5%) remediation method. In addition, the R4 (3:1) electrode was the most suitable choice as an air cathode for SC-MFC, with a fabrication cost of 17.71&#xa0;$ m<sup>−2</sup>. In conclusion, this study provides valuable insights into the preparation and optimization of air cathodes for MFCs, which can contribute to the development of future MFC technologies. </p>

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Performance of Single-Chamber Microbial Fuel Cells Based on the Air Cathode of Hydrophobicity of Carbon Black/Polytetrafluoroethylene Gas Diffusion Layer

  • 期刊论文

  • 发表日期：

    2025年4月26日

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  • Hongrui Cao,
  • Jin Sun,
  • Mingyang Hu,
  • Qing Feng,
  • Zejie Wang

摘要

The effect of hydrophobicity of the gas diffusion layer on the performance of a single-chamber microbial fuel cell was investigated. The R4 (3:1) reactor showed the best performance with a maximum power density of 1431 ± 80.3 mW m−2 and a coulombic efficiency of 45%. Scanning electron microscopy revealed that the gap between carbon black particles increased with decreasing PTFE ratio. Electrochemical analysis showed that the activated carbon/stainless-steel mesh/(CB/PTFE) electrode performed the best with the highest current density of 8.09 A m−2. High-performance recovery (88%) of the contaminated electrode was achieved using lysozyme (5%) remediation method. In addition, the R4 (3:1) electrode was the most suitable choice as an air cathode for SC-MFC, with a fabrication cost of 17.71 $ m−2. In conclusion, this study provides valuable insights into the preparation and optimization of air cathodes for MFCs, which can contribute to the development of future MFC technologies.