Electric double layer capacitance: it is caused by the charge confrontation formed by the directional placement of electrons or ions at the electrode/solution interface. For an electrode/solution system, a double electric layer will be formed on the interface between the electron conducting electrode and the ion conducting electrolyte solution. When an electric field is applied to the two electrodes, the anions and cations in the solution migrate to the positive and negative electrodes respectively, forming a double electric layer on the surface of the electrodes; After the electric field is revoked, the positive and negative charges on the electrode and the opposite charge ions in the solution attract each other to make the electric double layer stable, and a relatively stable potential difference occurs between the positive and negative electrodes. At this time, for an electrode, the opposite ionic charge of the same amount as the charge on the electrode will occur within a certain interval (loose layer), making it electrically neutral; When the two poles of the super capacitor are connected with the external circuit, the charge on the electrode will migrate and the current will break out in the external circuit. The ions in the solution will migrate to the solution and become electrically neutral, which is called double electric layer capacitor Super capacitor module The principle of charging and discharging.

Farad capacitor : The theoretical model was first proposed by Conway, which is that on the two-dimensional or quasi two-dimensional space of the surface and near surface of the electrode or in the body phase, the electroactive substance undergoes underpotential deposition, and the highly reversible chemical absorption and desorption agree with the oxidation recovery reaction, and the capacitance related to the electrode charging potential occurs. For Faraday quasi capacitor, the process of charge storage not only includes the storage on the double electric layer, but also includes the oxidation recovery reaction of electrolyte ions and electrode active substances. When the ions in the electrolyte (such as H+, OH -, K+or Li+) diffuse from the solution to the electrode/solution interface under the effect of an external electric field, they will enter the body phase of the active oxide on the surface of the electrode through the oxidation recovery reaction on the interface, so that a large number of charges are stored in the electrode. During discharge, these ions entering the oxide will return to the electrolyte from the beginning through the reverse reaction of the above oxidation recovery reaction, and the stored charges will be released through the external circuit, which is the charge discharge mechanism of Faraday quasi capacitor.

(1) The charging speed is fast, and it can reach more than 95% of its rated capacity after charging for 10 seconds to 10 minutes;

(2) The cycle service life is long, and the cycle times of deep charging and discharging can reach 100000~500000 times, without "memory effect";

(3) High current discharge capacity, high energy conversion efficiency, small process loss, high current energy cycle efficiency ≥ 90%;

(4) High power density, up to 300W/KG~5000W/KG, equivalent to 5~10 times of the battery;

(5) The raw material composition, production, use, storage and disassembly process of the product are free of pollution, and it is an ideal green environmental power supply;

（6） Super capacitor manufacturer The charging and discharging circuit is simple, without charging circuit like charging battery, with high safety factor and maintenance free for long-term use;

(7) Good ultra-low temperature characteristics, wide temperature range - 40 ℃~+70 ℃;

(8) It is easy to detect and the residual power can be read directly;

(9) The capacity range is usually 0.1F-1000F.

shortcoming

Improper use may cause electrolyte leakage;

Compared with the aluminum electrolytic capacitor, it has larger internal resistance, so it can not be used in AC circuit;

Advantages of super capacitor module

Capacitance reaching Farad level in a small volume;

No special charging circuit and control discharge circuit are required;

Compared with the battery, overcharge and overdischarge will not have a negative impact on its life;

From the perspective of environmental protection, it is a kind of green energy;

Super capacitor can be soldered, so there is no problem such as loose battery contact;