The basic principle of super capacitor, also called electrical double-layer capacitor, is to utilize the double-layer structure composed of active porous electrodes and electrolyte to obtain a large capacity. Structurally, a super capacitor can be thought of as two unrelated porous plates separated by an electrolyte when a voltage is applied to the two electrodes. The potential applied to the positive plate attracts the negative ions in the electrolyte, while the negative plate attracts the positive ions. Eventually two charge reservoirs are created, one layer separated in the positive plate and another layer separated in the negative plate, which is the origin of the double electric layer.
Since super capacitors do not have any chemical reaction in the process of use, they are completely based on physical changes, so they are relatively safer. In addition, best super capacitors are more suitable for high performance hybrid models because of their fast charging and discharging speed, high power density, high current discharge capability and lighter mass.
Another advantage of super capacitor is the high discharge power, and the stored electricity can be discharged in a very short period of time. The instantaneous burst of energy can achieve a magical effect similar to "nitrous acceleration". In the sports car static start or acceleration overtaking, the use of super capacitor can get a strong acceleration ability, while the energy feedback system during braking can also charge the super capacitor.
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