Energy storage capacitance also called electrochemical capacitors or supercapacitors, and conventional electrostatic capacitor different is mainly manifested in the amount of energy storage. As the energy storage oroutput device, how much the performance of its storage capacitance in size. According to the mechanism ofcapacitor energy storage, the principle has two kinds, many scientists are studying the advance wave upon waveout. The following is to say:

Electric double layer capacitor electrode in 1 P solution interface by directional arrangement of electrons and ionsor dipoles generated.

Double layer theory of this principle is the guiding ideology of the end of the nineteenth Century H elm h proposed by OTZ et al. On electric double layer theory and the representative of the model there are several, the elm h h OTZ model most as simple and can fully explain working principle of electric double layer capacitor. The model that metal surface electrostatic charge will be from the solution absorption part of irregular distribution of ions, so that they in the side of the p electrode solution interface solution, electrode from a certain distance in a row, forming a quantity of electric charge and the electrode surface residual charge is equal to the number and sign opposite to that of the interface layer. So, on the electrode and solution is formed of two layers of electric double layer charge,this is what we usually speak. The role of storing electrical energy of electric double layer, the storage capacity of the capacitor can be calculated using formula. Finally, we can get the conclusion is property of the electric double layer capacitor capacity and potential of electrode and the material itself. Usually in the electric double layer to form a stable, generally use the polarizable electrode with good conductive properties.

And the second principle is in electrode surface or the bulk phase of two dimensional and quasi two dimensional space, the electroactive substances of underpotential deposition and highly reversible chemical adsorption, removal or oxidation reduction reaction, and the electrode charge potential of Faraday quasi capacitor.

In electroactive substances, along with the existence in faradaic charge transfer of chemical changes in the electrochemical processes, electrode polarization occurred underpotential deposition and oxidation reduction reactions, charge and discharge behavior is similar to the capacitor, and different in the secondary battery, difference:

(1) the voltage and power polarization on the electrode almost in a linear relationship;

(2) when the voltage and time into a linear relationship between D V/d t=K, capacitor charge and discharge current for a constant value I=Cd V/d t=CK. this process is reversible kinetic process, and the secondary battery different but it is similar with the electrostatic. Faraday capacitance and the capacitance of electric double layer difference lies in: electric double layer capacitance in the charging process need to consume the electrolyte, and Faraday capacitance in the charging and discharging process of electrolyte concentration keep relatively stable.

Faraday pseudocapacitance not only on the surface of the electrode produced, but also can be generated in the interior of the electrodes, the maximum charge discharge capacity by the electroactive material surface orientation and ion charge transfer speed control, so you can in a short period of time to charge transfer, which can obtain higher specific power (ratio of power than 500W / kg).

Here, you have to understand the working principle of the energy storage capacitor.