Electric double layer capacitors can also be called supercapacitors, a new type of energy storage device with high energy density electrochemical capacitors, which are thousands of times higher in capacity than ordinary electrolytic capacitors. Electric double-layer capacitors have the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection.
Classification of electric double layer capacitors：
1. According to the principle, it can be divided into: electric double layer supercapacitor and pseudocapacitor supercapacitor
2. According to the electrolyte type, it can be divided into: water-based electrolyte and organic electrolyte type
can also be divided into:
1. Liquid electrolyte supercapacitors, most supercapacitors have liquid electrolyte.
2. Solid electrolyte supercapacitors. With the development of solid electrolytes for lithium-ion batteries, solid electrolytes such as gel electrolytes and PEOs have also been studied in the electrolytes used in supercapacitors.