A supercapacitor made partly from from the plant polymer lignin is a step towards sustainable energy storage. Supercapacitors are energy-storage devices that, like batteries, are made of two electrodes and an electrolyte, offering much faster charging and higher power. They’re used in cars, trains, heavy machinery, and power tools to provide short-term energy storage and bursts of power. The new energy-storing device is lightweight, flexible and low-cost.
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