New 'magnetoelastic' tent generates electricity from wind, body movement and sound to power small devices

Researchers have engineered a tent that generates electricity through motion, which could potentially power small devices in remote areas such as disaster zones and off-grid camps. The innovation lies in a property called magnetoelasticity, a phenomenon where magnetic flux density changes when mechanical stress is applied in the presence of a magnetic field.

This principle was first described by physicist Emilio Villari in 1865. The researchers described their design in a study published in the journal Matter on July 31. The tent employs smart textile layers that react to various forms of movement, capturing environmental and biomechanical energy. Ambient wind, human actions inside, or even the fabric's flexing during setup all contribute to the overall energy output, effectively turning the tent itself into a power generator.

The fabric itself functions as an energy harvester, with its magnetic state changing when it bends, stretches, or flexes, converting this change into electrical energy via induction. The tent's floor is composed of magnetoelastic ribbons, while the roof is built as a layered structure incorporating conductive fibers and magnetoelastic film.

Initial tests showed that tapping a small sample of the magnetoelastic textile unit with a hand was sufficient to charge a 0.22-μF capacitor to 5.8 volts within just 1.5 seconds. Although this amount of charge is insufficient to power a smartphone, it demonstrates the potential of even small pieces of this material to generate energy.

The scientists envision this technology being particularly useful in areas where electricity is scarce, unreliable, or unavailable. In such settings, even modest power generation can make a significant difference by powering LED lights, charging a phone, or running a small heater. The researchers frame this design as a response to the limitations of existing portable shelters, which often require power but generators need fuel, batteries add weight and maintenance, and solar panels depend on sunlight.

Unlike solar setups, the tent does not require bright sunlight to function. Wind, manipulation, and ordinary movement can all contribute to its energy output, enabling the system to collect electricity even in shaded conditions or at night, as long as the fabric continues to flex. The scientists emphasize that this technology is not intended to run high-drain appliances but rather to serve as a supplemental power source for low-power electronics like microwaves or power tools.

In its current form, the tent serves as a supplemental power source rather than a replacement for grid electricity or a high-capacity battery pack. However, considerable questions about the tent's durability remain. Future research will need to assess how much electricity the tent can generate in real-world conditions, how durable the textile remains after repeated folding and exposure to various weather conditions, and whether the design can be manufactured affordably at scale.

Despite these challenges, the prototype suggests that a modest shelter could one day offer more than just shelter, potentially powering everyday devices.