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Asymmetric Thermoelectrochemical Cell for Harvesting Low-grade Heat under Isothermal Operation
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Sustainable moisture-driven electricity generation using waste materials.

Aman Ul Azam Khan1, Nazmunnahar Nazmunnahar2, Mortuza Hasan1

  • 1Department of Textile Engineering, BGMEA University of Fashion and Technology, Dhaka, 1230, Bangladesh.

Scientific Reports
|July 14, 2026
PubMed
Summary

Researchers developed a low-cost moisture-driven electric generator (MEG) using waste biomass. This sustainable device converts ambient humidity into electricity, powering small electronics without external capacitors.

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Electrochemistry

Background:

  • Atmospheric moisture presents a vast, renewable energy source.
  • Current moisture-to-electricity systems are often costly and yield insufficient voltage for practical applications like wearable electronics.

Purpose of the Study:

  • To develop a cost-effective moisture-driven electric generator (MEG) from waste materials.
  • To achieve sufficient voltage and power output for direct operation of low-power electronics.

Main Methods:

  • Integrated wild sugarcane fibers and recycled cigarette-butt cellulose with an upcycled carbon-paste layer.
  • Utilized asymmetric current collectors to enhance directional ion migration.
  • Proposed a conceptual model for moisture adsorption, ion dissociation, and interfacial charge separation.

Main Results:

  • A single MEG unit produced up to 1.16 V and 16.44 µW cm⁻³.
  • The device operated under ambient humidity and restored function after drying and reabsorption.
  • Scalable configurations demonstrated direct powering of low-power electronics.

Conclusions:

  • Waste biomass and recycled materials can be transformed into efficient moisture-driven electric generators.
  • This low-cost technology offers a sustainable power source for self-powered and low-power electronic systems.
  • Moisture-activated textile composites represent a promising avenue for future energy harvesting.