Polarization resistance potential distribution effects

The calculation of the secondary current distribution in a cell of trapezoidal geometry illustrates the effect of the polarization resistance on the uniformity of the current and potential distribution at an electrode. Indeed, because the electrode potential is a unique function of the current density, E =f(i), the distributions of the current and of the potential are linked. 

The total capacitance in the walls of the pores is given by C, = c,L. This capacitance is attributed to double-layer effects, so it is usually a function of the potential. It can also be used to describe the space-charge polarization at the semiconductor-liquid junction if the spatial distribution of electrical charge as a function of potential is known. An ideally polarizable interface with charge transfer can be described by considering the charge transfer as a resistance, ret, which goes in parallel to the capacitance so that the impedance element yields an impedance such as ... 

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