With the advancement of science and technology, people now pay more and more attention to the use of ecological environment protection and green power. As a new type of energy storage element, supercapacitors have attracted widespread attention and attention. Supercapacitor is a new energy storage device developed in the 1970s and 1980s between batteries and traditional capacitors. Its appearance fills the gap between traditional electrostatic capacitors and chemical power sources.

A supercapacitor is a physical secondary power source with super power storage capability that can provide powerful pulsating power. If Farad capacitors are mainly divided into three categories according to the energy storage mechanism: 1. The capacitors that use conductive polymers as electrodes to produce oxidation recovery reactions; 2. The electric double-layer capacitors are generated by the separation of charges on the carbon electrode and the electrolyte interface; 3. Select metal oxides As the electrode, the oxidation recovery reaction occurs on the surface of the electrode and the bulk phase, and the Faradaic capacitance of reversible chemical adsorption occurs.

Electric double-layer supercapacitor is a new type of energy storage device that relies on polarized electrolyte to store electrical energy. High-power supercapacitors use their fast charge and discharge characteristics and long cycle life, and can replace batteries for this operation. Although the initial investment cost is high, it is cheaper than frequent protection and battery replacement, and it can also reduce the work intensity. .

The main research countries for supercapacitors are China, Japan, South Korea, France, Germany, Canada and the United States. From the perspective of manufacturing planning and technical level, Asia is temporarily ahead. The capacitance of a super capacitor unit is as high as several to tens of thousands of methods. The structure of the supercapacitor module adopts a special process, so that the equivalent resistance is very low, the capacitance is large, and the internal resistance is small, so that the supercapacitor has a high peak current, so the supercapacitor has a high specific power, Its power density is 50 to 100 times that of batteries, which can reach about 10×103W/kg. This feature makes supercapacitors very suitable for short-term high-power occasions.