The review of current status of literature on electrochemical capacitors is presented. The electrochemical capacitors are subdivided into filmic (dielcctrical), electrolytic and supercapacitors (SC). The last are subdivided into double layer capacitors (DLC), pseudocapacitors (PC) and hybrid capacitors (HC). The recharge of double electric layer on high surface area interface of electrodes is used in DLC. Electrical charge in PC is realized at the expense of Faradaic pseudocapacitance of sufficiently reversible redox reactions and double layer capacity.
