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Related Concept Videos

Microbial Fuel Cells01:23

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...

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Stretching Micropatterned Cells on a PDMS Membrane
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Fully Stretchable Microbial Fuel Cell with 75% Stretchability.

Shizhe Peng1, Jia Li2, Yihan Hu2

  • 1School of Nano Science and Technology, Suzhou Institute for Advanced Research, University of Science and Technology of China, Suzhou, Jiangsu, 215123, China.

Small (Weinheim an Der Bergstrasse, Germany)
|October 28, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a highly stretchable microbial fuel cell (MFC) capable of 75% strain. This innovation maintains power output under mechanical stress, paving the way for wearable electronics.

Keywords:
biohybrid materialbio‐electrochemistrymicrobial fuel cellstretchable device

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Area of Science:

  • Materials Science
  • Bioengineering
  • Electrochemistry

Background:

  • Developing stretchable microbial fuel cells (MFCs) is crucial for powering flexible and wearable electronics.
  • Existing MFC designs often compromise power output when subjected to mechanical strain.

Purpose of the Study:

  • To engineer a fully stretchable MFC with significant strain tolerance without sacrificing power generation.
  • To investigate the performance of electrogenic bacteria within a stretchable device architecture.

Main Methods:

  • Fabrication of a stretchable MFC using a polyurethane membrane encapsulating Shewanella oneidensis MR-1 and reduced graphene oxide (rGO) biohybrids on a polydimethylsiloxane (PDMS) current collector.
  • Integration of a stretchable air cathode.
  • Evaluation of MFC performance under varying mechanical strain levels (0% to 75%).

Main Results:

  • The stretchable MFC demonstrated stable operation up to 75% strain.
  • Peak power density increased with applied strain, reaching 6.6 ± 1.4 µW cm⁻² at 75% strain.
  • At 75% strain, the MFC achieved a maximum current output of 104 ± 27 µA cm⁻² and an open-circuit voltage of 283 ± 30 mV.

Conclusions:

  • The developed stretchable MFC design successfully integrates electrogenic bacteria and conductive materials for robust performance under mechanical deformation.
  • This work offers a viable pathway for creating self-powered wearable devices, soft robotics, and sustainable electronic systems.