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Some materials for energy storage devices (in particular, supercapacitors) can be expensive and pollute nature. Making alternative energy storage devices from things people typically throw away could help with this. The study, published in ACS Applied Materials & Interfaces reports turning chicken fat into carbon electrodes for supercapacitors that store energy and power LEDs.
Supercapacitors are being developed using carbon materials such as graphene due to their efficient charge transport and natural occurrence, but their manufacture is expensive and causes pollution. Researchers from the American Chemical Society have developed a simple, cost-effective method for converting waste chicken fat into electrically conductive nanostructures for energy storage in supercapacitors.
Scientists rendered chicken fat using a gas gun and burned the melted substance. They then collected the soot at the bottom of the flask, which was suspended above the flame. Electron microscopy showed that the soot contained nanostructures, which were uniform spherical lattices of concentric graphite rings. Researchers tested a way to improve the electrical properties of carbon nanoparticles by soaking them in a thiourea solution. This substance has the smell of fried onions, and the schematic representation of its molecule looks like a funny fat man.
Assembled into the negative electrode of an asymmetric supercapacitor, carbon nanoparticles from chicken fat demonstrated good capacity and durability, high energy density and power. As expected, these properties were further improved when the electrodes were made from carbon nanoparticles treated with thiourea.
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The researchers then demonstrated that the new supercapacitor could perform actions in real time: they charged and connected two of them to light up red, green and blue LEDs. The results highlight the potential benefits of using food waste such as chicken fat as a carbon source in the quest for even greener energy.
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