What is a supercapacitor (what is an electrochemical supercapacitor) - 推酷

ESD TVS electrostatic protection tube 0201 package 3.3V ultra low capacitance ESD

SMD aluminum electrolytic capacitor

Photocoupler

Chemical capacitors come in two broad categories: electrolytic capacitors and supercapacitors.
Supercapacitors generally use activated carbon (Active Carbon), ruthenium dioxide (RuO 2 ), a conductor polymer (polymer conductor) or the like as an anode, and a liquid electrolyte as a cathode. The ultracapacitor can obtain the electrostatic capacity of the Farad stage, which is advantageous for the miniaturization of the chemical capacitor. However, the disadvantage is that the cell has a limited withstand voltage, and the water-based electrolyte (Aqueous Electrolyte) has a withstand voltage of 1 V or less, even if it is The non-aqueous electrolyte is used, and the withstand voltage generally does not exceed 3V.

Specifically, a supercapacitor is an energy storage device between a capacitor and a battery. It has the characteristics of a capacitor that can be quickly charged and discharged, and has a storage mechanism of the battery. The redox reaction ultracapacitor can also be divided into Two types: (1) using activated carbon as the anode, storing the charge in an electric double layer mechanism, usually called an electric double layer capacitor (2) using cerium oxide or a conductor polymer as an anode, and storing the charge by a redox reaction mechanism. , commonly referred to as electrochemical capacitors.

Supercapacitor is a new type of energy storage device, which has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. Supercapacitors are widely used. It is used as a power balance power supply for lifting equipment to provide super-current power. It is used as a starting power source for vehicles. It has higher starting efficiency and reliability than conventional batteries. It can replace traditional batteries in whole or in part. It is used as traction energy for vehicles. It can produce electric vehicles, replace traditional internal combustion engines, and transform existing trolley buses; it can be used in military to ensure the smooth start of tanks, armored vehicles and other vehicles (especially in the cold winter), as a pulse energy source for laser weapons. It can also be used for energy storage in other electromechanical devices.