1.Overview of Ultracapacitor

Ultracapacitor (Ultracapacitor), also known as electrochemical capacitor, gold capacitor, Farad capacitor; including electric double layer capacitor (EDLC) and mass capacitor (Electrochemical pseudocapacitor), store energy by polarized electrolyte. Supercapacitors are a new type of energy storage device that combines the advantages of traditional capacitors and secondary batteries. The energy storage process does not undergo chemical reactions, and the energy storage process is reversible. It is precisely because of this supercapacitor that it can be repeatedly charged and discharged for 500,000 to 1,000,000 times. It is composed of porous carbon electrode material with high specific surface area, current collector, porous separator and electrolyte. Energy storage is carried out by utilizing the electric double layer effect at the interface between the electrode material and the electrolyte.

2.Working Principle of Ultracapacitor

Supercapacitors (EDLCs) are produced by the confrontation effect of charges caused by the alignment of electrons or ions at the electrode I-electrolyte interface. 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 an electric double layer on the surface of the electrodes; after the electric field is removed, the positive and negative charges on the electrodes and the oppositely charged ions in the electrolyte The electric double layer is stabilized by attracting each other, and a relatively stable potential difference is generated between the positive and negative electrodes. At this time, for a certain electrode, an opposite ion charge equivalent to the charge on the electrode will be generated within a certain distance (dispersion layer) to keep it electrically neutral; when the two electrodes are connected to the external circuit, the The electric charge migrates to generate a current in the external circuit, and the ions in the electrolyte migrate into the solution to be electrically neutral, which is the charging and discharging principle of the electric double layer capacitor.

3.performance feature of Ultracapacitor

• Fast charging. It only takes 1 second to 10 minutes to fill up to 95% of its rated capacity;
• Long cycle life. Deep charge and discharge cycles can reach 50-1 million times;
• High energy conversion efficiency. The high current energy cycle efficiency can reach more than 90%;
• High power density. Up to 50000W/kg, which is 5-10 times that of the battery;
• The production, use, storage and dismantling of raw materials are pollution-free and environmentally friendly;
• High safety factor. Maintenance-free for long-term use;
• Wide temperature range. Up to -40 - + 10°c.