is the capacity of supercapacitor so high and the withstand voltage value so low?-足球看盘软件

the voltage withstand value of a capacitor indicates the voltage that the capacitor can withstand when it is used continuously under certain conditions. if the working voltage on the capacitor exceeds the rated voltage, the insulation inside the capacitor may be broken down, resulting in short circuit between the electrodes or serious leakage.

what determines the voltage resistance of capacitors? each type of capacitor is made of different materials, such as ceramic capacitor, film capacitor and aluminum electrolytic capacitor. their raw materials are different, that is, the mentioned materials are different. for example, ceramic capacitor is made of silver plated on ceramic as electrode, and film capacitor is made of plastic film as dielectric, aluminum electrolytic capacitors use electrolytes as the medium, so the capacity and withstand voltage of the capacitors produced are not consistent, and they also have different appearance and performance characteristics. for example, ceramic capacitors have high withstand voltage and low capacity, electrolytic capacitors have high capacity and low withstand voltage, and film capacitors are more balanced, with long service life. for example, supercapacitor, also known as farad capacitor, has the same characteristics as electrolytic capacitor, with large capacity and low voltage withstand. although the characteristics are the same, the capacity of supercapacitor is more than ten times or even more than that of electrolytic capacitor, because the capacity unit of electrolytic capacitor is hf, super capacitor is the largest unit of capacitor capacity, f is also called farad, so it is also called super farad capacitor.

 

as for the low withstand voltage of supercapacitors, as mentioned in this paper, the capacity and withstand voltage characteristics of each type of capacitor are determined by different materials, the dielectric material used in supercapacitor is carbon as the dielectric of capacitor. because supercapacitor uses the double-layer structure composed of activated carbon porous electrode and electrolyte to obtain super large capacity, there is no way to make it particularly large in terms of withstand voltage. if this technical problem is broken through, it will not be supercapacitor, and it may be developed by new researchers people named other capacitors.