Supercapacitors are energy storage devices with high power density and long lifespan, featuring rapid charge and discharge characteristics. Compared with traditional batteries, high voltage supercapacitor can release a large amount of electrical energy in an extremely short period of time, and this large supercapacitor also has a fast charging speed and long cycle life. Supercapacitors store energy through the electric double-layer capacitance and pseudocapacitance effects. These high power supercapacitors are commonly used in fields such as electric vehicles, renewable energy systems and industrial equipment. They are suitable for scenarios that require quick response and high-frequency charge and discharge, and can work stably even under extreme temperatures.