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Researchers improved MFC performance using double oxidant-treated carbon felts, increasing current density and peak power density.

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What they did

System
MFC

What worked

Power density125mW/m²best of 3
Current density0.75A/m²

Abstract

The aim of this study was to enhance and maintain bioelectricity generation from distillery spent wash using a microbial fuel cell (MFC). Electrode materials play a critical role in the generation of bioelectricity in MFCs. Utilizing double oxidant-treated carbon felts in MFC applications increased current density to 749.56 mA/m² and increased peak power density to 125.23 mW/m². Electrochemical impedance spectroscopy (EIS) analysis further verified the improved electrocatalytic activity observed in the oxidized carbon felt, consistent with the findings from cyclic voltammetry (CV) and polarization curves, thereby confirming the enhanced performance of the oxidized carbon felt electrode. Overall, the study highlights the significance of electrode morphology and surface modifications in influencing microbial adhesion, electron transport, and the overall efficiency of fuel cells using distillery spent wash as a substrate.

Key findings

  • Current density increased to 749.56 mA/m²
  • Peak power density increased to 125.23 mW/m²
  • Electrochemical impedance spectroscopy analysis confirmed improved electrocatalytic activity

Keywords

Microbial fuel cellCarbon fibersFuel cellsEnvironmental chemistryChemical engineering

Identifiers

DOI
10.3390/electrochem6020012
Journal
Electrochem
Year
2025