An electrochemical capacitor storing charge through high-area electric double layers, pseudocapacitance, or a combination. Its device energy depends on usable voltage, inactive mass and rate capability as well as electrode capacitance.
Charge-storage response of separated ionic and electronic charge at an electrode-electrolyte interface. The differential capacitance is ; it can vary with electrode potential, ion packing and surface structure.
Capacitor-like differential charge storage produced by sufficiently fast and reversible Faradaic processes over a useful potential interval. A redox-active nanomaterial is not necessarily pseudocapacitive.
A supercapacitor whose principal storage mechanism is non-Faradaic charge separation at electrode–electrolyte interfaces. The two electrode interfaces contribute series capacitances.
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