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Researchers developed a novel paper-based battery powered by bacteria. This low-cost device offers rapid power generation and enables faster screening of electricity-producing microbes for various applications.

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Area of Science:

  • Biotechnology
  • Energy Harvesting
  • Microfluidics

Background:

  • Paper-based devices offer low-cost fluid manipulation and testing.
  • Integrating power sources into paper devices presents system-level challenges.
  • Conventional microbial fuel cells (MFCs) require significant time for bacterial acclimation.

Purpose of the Study:

  • To develop a microfabricated, paper-based, bacteria-powered battery.
  • To demonstrate a rapid screening platform for electricity-generating bacteria.
  • To overcome limitations of traditional MFCs and existing screening methods.

Main Methods:

  • Fabrication of a paper-based proton exchange membrane on parchment paper.
  • Integration of paper reservoirs for anolyte and catholyte.
  • Utilizing microbial metabolism for power generation in a paper-based format.
  • Development of a pump-free paper-based microbial screening tool.

Main Results:

  • The paper-based battery exhibited a significantly shorter start-up time compared to conventional MFCs.
  • Four series-connected batteries powered an LED for over 30 minutes.
  • The microbial screening platform provided results in under 50 minutes, drastically faster than traditional methods (up to 103 days).

Conclusions:

  • Paper-based bacteria-powered batteries are feasible, offering rapid power and short start-up times.
  • The developed platform enables efficient and rapid characterization of electricity-generating bacteria.
  • This technology holds promise for low-cost, portable analytical and power-generating systems.