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This paper explores the issue of voltage reversal in serially connected microbial fuel cells (MFCs) and proposes a power management circuit to mitigate this problem.

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What they did

System
MFC

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Abstract

Microbial fuel cells (MFCs) are regarded as a promising and environmental friendly method for wastewater treatment and bio-production. The output power of a single cell is inadequate to drive loads directly. Microbial fuel cells stacked in serials will promote bio-production or bioremediation and the voltage of the MFCs can be scaled up by connecting the cells in serials, whereas voltage reversal may emerge in this case. The causes for reversing polarity of MFCs have received great attention in recent years. This paper designs a power management circuit for microbial fuel cell, studies the mechanisms of voltage reversal and the approaches to solve the problem.

Key findings

  • Voltage reversal in MFCs is caused by differences in internal resistance and electrochemical reactions between cells.
  • The proposed power management circuit can effectively prevent voltage reversal and increase the overall voltage of the MFC stack.
  • The circuit's performance is validated through experiments, demonstrating its potential for practical applications.

Keywords

Microbial fuel cellPolarity (international relations)VoltageCell voltageReversingBioremediation

Identifiers

DOI
10.4028/www.scientific.net/kem.609-610.1422
Journal
Key Engineering Materials
Year
2014