A capacitor is a type of electrical component that stores and releases electrical energy. It consists of two conductive plates separated by an insulating material called the dielectric. When a voltage is applied to the capacitor, it stores electrical charge on its plates. When the voltage is removed, the stored charge is released.
A supercapacitor, also known as an ultracapacitor, is a type of capacitor that has a much higher capacitance than a regular capacitor. This means that it can store more electrical charge, and therefore has the ability to release a larger amount of electrical energy than a regular capacitor. Supercapacitors are often used in applications where a large amount of electrical energy needs to be stored and released quickly, such as in certain types of electric vehicles and power tools.