Explain the characteristics of supercapacitors

Features of Super Capacitors (1) Extremely high charging and discharging rate Super capacitors have high power density, can send out several hundred to several thousand amperes in a short time, and the charging speed is fast, which can be in tens of seconds to several minutes Complete the charging process. Super capacitor buses and trams use this function to complete charging and drive the vehicle in a short time. (2) Long cycle life Supercapacitors have very little loss during charging and discharging, so theoretically their cycle life is unlimited. In practical applications, it can reach more than 100,000 times, which is 10-100 times that of batteries. (3) The function of low temperature is better. Most of the charge and discharge process of the charge transfer of the capacitor is carried out on the surface of the active material electrode, so there is little ability to weaken, the temperature, in general, the capacity decay fluctuation of the lithium battery is as high as 70 %. (4) A bottleneck of low energy density supercapacitors is their low energy density, which is only 1/20 of that of lithium batteries, or about 10Wh/kg. Therefore, it cannot be used as the main power source of electric vehicles, and is mostly an auxiliary power source, which is mainly used for quick start equipment and braking energy recovery equipment. Disclaimer: Some pictures and content of articles published on this site are from the Internet. Please contact to delete if there is any infringement. Previous: Analysis of important types of lithium batteries