https://doi.org/10.1351/goldbook.I03068
Integral capacitance (per unit area of electrode) is given by \[K=\frac{Q}{E- E_{Q=0}}\] where \(Q\) is the @[email protected] (per unit area of electrode), \(E\) is the potential of the electrode with respect to a @[email protected], and \(E_{Q=0}\) is the @[email protected]