On the ideal polarisability of electrodes displaying cpe-type capacitance dispersion

Measurements of the double layer capacitance for electrodes in supercritical CO2/acetonitrile electrolytes

“…These factors have been reviewed by Orazem and Tribollet [23] who show that the impedance for a 'blocking electrode' (or in this case simply one where only charging and discharging the surface is considered) can be expressed in terms of a constant phase element (CPE) as (1) where R is the electrolyte or ohmic resistance, j is the imaginary number (√-1), Q is the CPE coefficient and α the CPE exponent. For an in depth discussion of the significance of the CPE in this context the reader is directed to the literature [24][25][26][27][28]. The data in Figure 3 give an alpha value which is close to 1 (in this case 0.945) and so Q can be approximated to C [29].…”

Amorphous and crystalline IrO2 thin films as potential stimulation electrode coatings

“…where i is the imaginary number, v is the angular frequency, Q is a constant and a is a parameter that has a value between 0 and 1 [29]. In case of an ideal capacitance a = 1, and Q is the capacitance.…”

“…In case of an ideal capacitance a = 1, and Q is the capacitance. Recently, the CPE behavior has been widely studied and discussed in literature [29][30][31]. It has been argued that CPE behavior is a result of surface roughness or any other structure of the surface (porosity, fractal nature) [32].…”

Potential of zero charge of monocrystalline copper electrodes in perchlorate solutions

“…[24,25]). If the dl is considered as a pure capacitor the plane diagram Z 00 vs Z 0 should exhibit a straight vertical line intersecting the horizontal axis at Z 0 ¼ R s (R s being the ohmic resistance of the solution).…”