Researchers at the IIT Indore have developed a device that will generate electricity from just water and the natural process of evaporation without the need of sunlight, battery or any complex machine, officials said.
The device will be able to continuously provide power to small electronic devices, they said.
At the heart of the invention is a specially engineered membrane made of graphene oxide (a layered form of carbon) combined with zinc-imidazole, a stabilising compound, the officials from the Indian Institute of Technology (IIT) Indore said.
“When the membrane is partially immersed in water, it begins generating electricity as water travels upward through microscopic channels and evaporates. This evaporation-driven movement separates positive and negative ions at opposite ends of the membrane, creating a steady voltage,” an official said.
A single membrane of 3 x 2 cm² can generate up to 0.75 volts, while multiple membranes can be combined to scale up power output, according to the official.
“Remarkably, the device works not only with clean water but also with saline or muddy water, retaining stability for months. Its versatility makes it ideal for regions with unreliable electricity or limited access to power,” the official said.
The potential applications range from powering environmental sensors in forests and farms to providing emergency lighting during blackouts or supporting low-power medical wearables in remote clinics, according to officials.
Researchers develop device to generate electricity from air, water
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