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HomeTechnologyNew fuel cell runs indefinitely on dirt power developed by scientists.

New fuel cell runs indefinitely on dirt power developed by scientists.

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The Northwestern University research team has developed a new fuel cell that taps into energy provided by microbes living in soil. This innovative technology, about the size of a standard paperback book, could potentially power underground sensors used in precision agriculture and green infrastructure, offering a sustainable alternative to batteries. The soil-powered fuel cell, equipped with a 3D-printed cap that keeps out debris and enables air flow, significantly outperformed similar technologies, lasting 120% longer and delivering a sustainable solution for low-energy devices. The researchers are releasing designs, tutorials, and simulation tools for broad public use, making this groundbreaking technology widely accessible for application.

To test the soil-powered fuel cell, the researchers used it to power soil moisture sensors and touch detection. Additionally, they equipped the sensors with a tiny antenna for wireless data transmission, reflecting existing radio frequency signals to a neighboring base station. These microbial fuel cells harvest energy from bacteria that donate electrons to nearby conductors and create an electric circuit, making it a practical, low-energy solution for various applications. The research team tested four different versions of the fuel cell, ultimately selecting a prototype that outperformed existing technologies in dry and wet conditions, producing 68 times more power than required to operate its sensors. The soil-powered technology could potentially revolutionize precision agriculture and green infrastructure in a sustainable and eco-friendly manner.

Farmers worldwide have adopted precision agriculture to improve crop yields, requiring a widespread, dispersed network of electronic devices to measure specific soil conditions. By harnessing energy from the soil for these purposes, the Northwestern University research team provides a low-energy, sustainable alternative to batteries with toxic, flammable chemicals. By offering widespread public access to designs, tutorials, and simulation tools, the researchers have opened the door for potential widespread use and advancement of this groundbreaking soil-powered fuel cell technology.

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