Supercapacitors are energy storage devices that can charge and discharge much faster than traditional batteries. They store energy through electrostatic fields, allowing them to deliver quick bursts of power. This makes them ideal for applications like regenerative braking in electric vehicles and providing backup power for electronic devices. Unlike batteries, which rely on chemical reactions, supercapacitors can endure many more charge and discharge cycles without degrading. They are often used in combination with batteries to enhance performance, providing a bridge between the high energy density of batteries and the rapid power delivery of capacitors. This combination is crucial for modern technologies like electric vehicles and renewable energy systems.