SourceDigital Trends•Stalecollected in 14m
Kitchen items power wearables via atmospheric humidity
A breakthrough in sustainable, battery-free power for edge AI sensors and wearable hardware.
30-Second TL;DR
What Changed
Utilizes gelatin, table salt, and activated charcoal for energy harvesting
Why It Matters
This research could significantly reduce the environmental footprint of IoT devices by eliminating the need for toxic battery components. It opens new design paradigms for autonomous, low-power edge sensors.
What To Do Next
Explore energy harvesting materials for your next low-power edge AI project to reduce dependency on traditional battery power.
Who should care:Developers & AI Engineers
Key Points
- •Utilizes gelatin, table salt, and activated charcoal for energy harvesting
- •Converts ambient humidity directly into usable electricity
- •Enables battery-free operation for small-scale wearable tech
- •Promotes sustainable, biodegradable electronic hardware design
Deep Insight
Background and context from public sources — not the original article. 9 sources cited.
Enhanced Key Takeaways
- •The device, termed a Moisture-Electric Generator (MEG), was developed by an international research team primarily led by scientists at Queen Mary University of London.
- •Individual MEG units can generate approximately 1 volt, and when connected in series, the research team demonstrated scaled performance of up to 90 volts and 5.08 mA, sufficient to power small electronic devices like a 40-light LED string.
- •Beyond its primary function of power generation, the material also exhibits potential as a sensitive, skin-compatible sensor, capable of detecting physiological signals such as breathing patterns and speech variations through changes in moisture.
- •The MEG is manufactured using a simple, water-based process and is designed for an environmentally benign end-of-life, capable of biodegrading in soil within a few weeks or dissolving in water, allowing for the recovery and reuse of its components.
- •The technology operates by absorbing water molecules, and as the gelatin-salt solution dries, it self-organizes into a three-layered structure that facilitates ion movement within the material when exposed to humidity, generating a continuous and stable electrical output.
Competitor Analysis
Materials
- Queen Mary University (Gelatin/Salt/Charcoal MEG)
- Gelatin, sodium chloride (table salt), activated carbon (food-grade, biodegradable)
- National University of Singapore (Fabric MEG)
- Fabric (wood pulp/polyester), sea salt, carbon ink, water-absorbing gel
- Binghamton University (Paper-based MEG)
- Paper, bacterial spores, Janus paper layer (hydrophobic/hydrophilic)
- UMass Amherst (Generic Air-gen Effect)
- Nearly any material engineered with nanopores
- CascataChuva (Hygroelectricity)
- Unspecified hygroscopic materials (Lisbon-based Catcher project)
Power Output (Single Unit)
- Queen Mary University (Gelatin/Salt/Charcoal MEG)
- ~1 volt per unit; scaled up to 90V, 5.08mA (multiple units)
- National University of Singapore (Fabric MEG)
- Up to 0.7 volts (1.5x2 cm piece)
- Binghamton University (Paper-based MEG)
- Sustained high-efficiency output (specific voltage/current not detailed for single unit)
- UMass Amherst (Generic Air-gen Effect)
- Small but continuous electric current (specifics not detailed for single unit)
- CascataChuva (Hygroelectricity)
- 1.5 volts, 10 milliamps (4cm disc)
Duration/Stability
- Queen Mary University (Gelatin/Salt/Charcoal MEG)
- Continuous and stable for over 30 days per unit
- National University of Singapore (Fabric MEG)
- Over 150 hours in a constant environment
- Binghamton University (Paper-based MEG)
- Consistent performance across diverse humidity conditions
- UMass Amherst (Generic Air-gen Effect)
- Continuous 24/7 operation
- CascataChuva (Hygroelectricity)
- Unspecified, but aims for commercialization
Key Mechanism
- Queen Mary University (Gelatin/Salt/Charcoal MEG)
- Ion movement within a self-stratified three-layered gelatin-salt structure upon humidity exposure
- National University of Singapore (Fabric MEG)
- Ion separation from sea salt in a wet region, creating an electrical field with carbon nanoparticles
- Binghamton University (Paper-based MEG)
- Water adsorption gradient and functional group gradient in nanoporous biofilm and Janus paper
- UMass Amherst (Generic Air-gen Effect)
- Water molecules bumping into nanopore edges, creating a charge difference
- CascataChuva (Hygroelectricity)
- Unspecified, but involves changing atmospheric humidity into renewable power
Environmental Impact
- Queen Mary University (Gelatin/Salt/Charcoal MEG)
- Biodegradable, dissolvable in water for component recovery, low e-waste
- National University of Singapore (Fabric MEG)
- Non-toxic sea salt, potential for sustainable desalination byproduct
- Binghamton University (Paper-based MEG)
- Eco-friendly, cost-effective, disposable
- UMass Amherst (Generic Air-gen Effect)
- Broad material choices for environment-adaptable fabrications
- CascataChuva (Hygroelectricity)
- Aims for renewable power
Additional Functionality
- Queen Mary University (Gelatin/Salt/Charcoal MEG)
- Physiological sensing (breathing, speech, touchless proximity)
- National University of Singapore (Fabric MEG)
- Potential for portable power source for small electronics
- Binghamton University (Paper-based MEG)
- Enhanced moisture capture, suitable for disposable wearables
- UMass Amherst (Generic Air-gen Effect)
- Scalable by stacking devices
- CascataChuva (Hygroelectricity)
- Aims for large-scale power generation (e.g., 10 kWh/day from stacked units)
| Feature/Technology | Queen Mary University (Gelatin/Salt/Charcoal MEG) | National University of Singapore (Fabric MEG) | Binghamton University (Paper-based MEG) | UMass Amherst (Generic Air-gen Effect) | CascataChuva (Hygroelectricity) |
|---|---|---|---|---|---|
| Materials | Gelatin, sodium chloride (table salt), activated carbon (food-grade, biodegradable) | Fabric (wood pulp/polyester), sea salt, carbon ink, water-absorbing gel | Paper, bacterial spores, Janus paper layer (hydrophobic/hydrophilic) | Nearly any material engineered with nanopores | Unspecified hygroscopic materials (Lisbon-based Catcher project) |
| Power Output (Single Unit) | ~1 volt per unit; scaled up to 90V, 5.08mA (multiple units) | Up to 0.7 volts (1.5x2 cm piece) | Sustained high-efficiency output (specific voltage/current not detailed for single unit) | Small but continuous electric current (specifics not detailed for single unit) | 1.5 volts, 10 milliamps (4cm disc) |
| Duration/Stability | Continuous and stable for over 30 days per unit | Over 150 hours in a constant environment | Consistent performance across diverse humidity conditions | Continuous 24/7 operation | Unspecified, but aims for commercialization |
| Key Mechanism | Ion movement within a self-stratified three-layered gelatin-salt structure upon humidity exposure | Ion separation from sea salt in a wet region, creating an electrical field with carbon nanoparticles | Water adsorption gradient and functional group gradient in nanoporous biofilm and Janus paper | Water molecules bumping into nanopore edges, creating a charge difference | Unspecified, but involves changing atmospheric humidity into renewable power |
| Environmental Impact | Biodegradable, dissolvable in water for component recovery, low e-waste | Non-toxic sea salt, potential for sustainable desalination byproduct | Eco-friendly, cost-effective, disposable | Broad material choices for environment-adaptable fabrications | Aims for renewable power |
| Additional Functionality | Physiological sensing (breathing, speech, touchless proximity) | Potential for portable power source for small electronics | Enhanced moisture capture, suitable for disposable wearables | Scalable by stacking devices | Aims for large-scale power generation (e.g., 10 kWh/day from stacked units) |
Technical Deep Dive
- The Moisture-Electric Generator (MEG) is fabricated from food-grade materials: gelatin, sodium chloride (table salt), and activated carbon.
- The device functions by absorbing water molecules from the surrounding air or human skin.
- As the gelatin-salt solution dries during manufacturing, it self-organizes into a distinct three-layered structure.
- This specific architecture enables the movement of ions within the material when exposed to ambient humidity, which directly generates a continuous and stable electrical output.
- Each individual unit of the MEG produces approximately 1 volt.
- The stability of the electrical output allows for continuous operation for periods exceeding 30 days per unit.
- For higher power requirements, multiple MEG units can be connected in series, demonstrating a scalable performance of up to 90 volts and 5.08 mA.
- The research paper detailing this technology is titled "A biobased moisture-electric generator with self-stratified architecture for physiological sensing and energy harvesting," published in Nano Energy on May 19, 2026.
Future ImplicationsAI analysis grounded in cited sources
This technology will significantly reduce electronic waste by providing a sustainable, biodegradable alternative to conventional batteries for small electronics.
The device is made from food-grade, non-toxic materials and is designed to biodegrade safely or be dissolved for component recovery, directly addressing the rising global e-waste problem.
The dual functionality of power generation and sensing will enable new categories of self-powered, skin-compatible wearable health monitors.
The device's electrical output responds to subtle moisture changes, allowing it to monitor physiological signals like breathing and speech in real-time without requiring an external battery.
The simple, water-based manufacturing process and use of widely available materials will facilitate scalable and cost-effective production.
The research highlights the use of simple, sustainable components and a water-based manufacturing process, indicating its potential for widespread adoption and low-impact production.
Timeline
2015
Profs Svitlana, Andriy, and Sergiy Lyubchyk began working on humidity-based electricity generation (hygroelectricity) in Lisbon.
2018
An accidental discovery at the University of Massachusetts (UMass) Amherst revealed that a humidity sensor was producing an electrical signal without being plugged in.
2020
Jun Yao and Derek Lovley at UMass Amherst published work demonstrating continuous electricity harvesting from air using a specialized material.
2022-09
Researchers at the National University of Singapore (NUS) developed a moisture-driven electricity generation (MEG) device using sea salt, carbon ink, and a water-absorbing gel on fabric.
2023-05
A team of engineers at UMass Amherst published research on the 'generic Air-gen effect,' showing nearly any nanoporous material can continuously harvest electricity from humidity.
2026-05-19
An international research team led by Queen Mary University of London published their study on the gelatin, salt, and charcoal-based Moisture-Electric Generator (MEG) in Nano Energy.
- 2015Profs Svitlana, Andriy, and Sergiy Lyubchyk began working on humidity-based electricity generation (hygroelectricity) in Lisbon.
- 2018An accidental discovery at the University of Massachusetts (UMass) Amherst revealed that a humidity sensor was producing an electrical signal without being plugged in.
- 2020Jun Yao and Derek Lovley at UMass Amherst published work demonstrating continuous electricity harvesting from air using a specialized material.
- 2022-09Researchers at the National University of Singapore (NUS) developed a moisture-driven electricity generation (MEG) device using sea salt, carbon ink, and a water-absorbing gel on fabric.
- 2023-05A team of engineers at UMass Amherst published research on the 'generic Air-gen effect,' showing nearly any nanoporous material can continuously harvest electricity from humidity.
- 2026-05-19An international research team led by Queen Mary University of London published their study on the gelatin, salt, and charcoal-based Moisture-Electric Generator (MEG) in Nano Energy.
Sources (9)
Factual claims are grounded in the sources below. Forward-looking analysis is AI-generated interpretation.
1qmul.ac.ukvertexaisearch.cloud.google.com2eurekalert.orgvertexaisearch.cloud.google.com3stardrive.orgvertexaisearch.cloud.google.com421stcentech.comvertexaisearch.cloud.google.com5designnews.comvertexaisearch.cloud.google.com6binghamton.eduvertexaisearch.cloud.google.com7nih.govvertexaisearch.cloud.google.com8umass.eduvertexaisearch.cloud.google.com9theguardian.comvertexaisearch.cloud.google.com
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