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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.
Supercapacitors are produced by the confrontation effect of charges caused by the alignment of electrons or ions at the electrode/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 are the same as the oppositely charged ions in the electrolyte.
