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Scientists at UCLA's California NanoSystems Institute have developed a new device that combines the high energy densities of batteries and the quick charge and discharge rates of supercapacitors. The hybrid supercapacitor is reportedly six times as energy-dense as a commercially available supercapacitor and packs nearly as much energy per unit volume as a lead-acid battery.

Batteries can store a lot of energy in a small and light package, but they can’t charge or discharge very quickly or last a long time the way supercapacitors can. A single device that combines all of these positive attributes could change the entire technological landscape of today, leading to lighter, compact phones and electric cars that charge in seconds instead of hours.

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