integral capacitance

of an electrode

Integral capacitance (per unit area of electrode) is given by

$K = Q E − E Q = 0$

where $Q$ is the electric charge (per unit area of electrode), $E$ is the potential of the electrode with respect to a reference electrode, and $E Q = 0$ is the potential at the point of zero charge.

Source:

PAC, 1974, 37, 499 (Electrochemical nomenclature) on page 509