ultracapacitors

Electric double-layer capacitors (EDLC) are electrochemical capacitors which energy storage predominant is achieved by Double-layer capacitance. In the past, all electrochemical capacitors were called "double-layer capacitors". However, since some years it is known that double-layer capacitors together with pseudocapacitors are part of a new family of electrochemical capacitors called supercapacitors, also known as ultracapacitors. Supercapacitors do not have a conventional solid dielectric. See the entry on supercapacitors for an in depth treatment on the subject.