With the continuous development of electronic technology, capacitors, as one of the most basic electronic components, have gradually been widely used. Among all kinds of capacitors, supercapacitors are relatively new capacitors. Let us introduce the difference between supercapacitors and traditional capacitors in detail.

Supercapacitors are high-energy-density capacitors developed on the basis of traditional capacitors. Compared with traditional capacitors, supercapacitors have the advantages of large capacity, high energy density, long life, low internal resistance, and high power density. Therefore, they are widely used in many application fields.

1. The difference between supercapacitors and traditional capacitors in structure

The structure of supercapacitors is very different from that of traditional capacitors. Traditional capacitors generally use metal foil as electrodes, apply an insulating film on the metal foil, and then roll the two electrodes into a cylindrical shape and install them in the capacitor. Supercapacitors use carbon powder embedded in the micro-nano pores on the surface of the electrode material as the electrode material, and apply electrolyte on the surface of the electrode material to give it a double-layer structure.

2. Different power storage principles

The power storage mechanism of supercapacitors mainly uses the double electric layer on the surface of the electrode to store charges, that is, to store positive and negative charges in the electron layer between the electrode surface and the electrolyte. Traditional capacitors store a certain amount of charge in the medium between the two electrodes through the electric field between the electrodes.

3. Different storage capacity

Supercapacitors have much stronger storage capacity than traditional capacitors. The charge storage capacity of traditional capacitors is generally only at the microfarad level, while the charge storage capacity of supercapacitors can reach above the farad level. This is also an important reason why supercapacitors are widely used in high-tech fields such as new energy, electric vehicles, electric toys, flashlights, etc.

4. The difference between voltage and internal resistance of supercapacitors and traditional capacitors

Supercapacitors have the advantages of small internal resistance and large capacitance, and can release a large amount of electrical energy in a short time. Traditional capacitors have small capacity and low voltage, and have certain disadvantages when used in occasions where a large amount of flow energy is required in a short time.

5. Different service life

The life of supercapacitors is about 10 times that of traditional capacitors, and can reach tens of thousands of cycles. Traditional capacitors are severely worn due to continuous chemical reactions inside and need to be replaced continuously.

6. Price difference

Supercapacitors are expensive, while traditional capacitors are relatively affordable. Therefore, supercapacitors are still limited to a certain range due to economic costs and cannot be widely used in various fields.

In general, supercapacitors have many superior properties compared to traditional capacitors and are a new type of capacitor that is very worthy of research and application. Of course, they also face a series of challenges and problems, such as the balance between cost and performance, durability, etc. I believe that with the continuous advancement and development of science and technology, these problems will gradually be solved, and the application scope of supercapacitors will be further expanded.