In a recent paper in the journal Nanotechnology, the researchers demonstrated a one-step process for turning used cigarette filters (the main component of butts) into a material that can be used to store energy in supercapacitors—components that can be used alongside batteries in the electrical grid, consumer electronics and electric vehicles.
Supercapacitors excel at delivering a swift power boost when needed (say, when you hit the accelerator in an electric car, or during peak hours in an electrical grid), taking stress off the battery, which is better at delivering a constant flow.
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