Researchers developed a biodegradable device that generates electricity from ambient humidity using gelatin, table salt, and activated charcoal [1].
This breakthrough offers a sustainable, battery-free power source for the growing market of wearable electronics and smart-home devices. By eliminating the need for traditional batteries, the technology reduces reliance on toxic chemicals and rare metals found in standard power cells [2].
The Moisture-Electric Generator, or MEG, was developed through a collaboration between Queen Mary University of London, the University of Warwick, Imperial College London, and Università Mercatorum [1]. The team conducted the research across institutions in the United Kingdom and Italy [1].
According to a study published in Nano Energy in April 2026, the device harvests energy directly from the moisture present in the air [3]. The use of everyday ingredients makes the generator both cost-effective and environmentally friendly, allowing the device to break down naturally after use [1].
The researchers designed the MEG to target low-power electronics. These include sensors and small gadgets that typically require constant battery replacements or charging cables [2]. By utilizing the constant presence of humidity, the devices can maintain a steady power supply without external input [2].
This approach to energy harvesting focuses on the intersection of material science and sustainability. The combination of gelatin and charcoal creates a structure capable of capturing water molecules from the air and converting that interaction into an electrical charge [1].
“Researchers developed a biodegradable device that generates electricity from ambient humidity”
The development of a Moisture-Electric Generator signals a shift toward 'invisible' energy harvesting, where devices draw power from their environment rather than stored chemical energy. If scalable, this could significantly reduce electronic waste by replacing disposable batteries in billions of small-scale IoT devices with biodegradable alternatives.
