If the charging current is negligible, in the case of a single electrode reaction, the electrode current density ($\text{c.d.}$) of the electric current flowing through the electrode is related to the flux density of a species B by the equation: $$j=n{\nu }_{\text{B}}^{-1}F{\left(N_{\text{B}}\right)}_e$$ where ${\left(N_{\text{B}}\right)}_e$ is the normal component of the vector $N_{\text{B}}$ at the electrode-solution interface, $n$ is the charge number of the electrode reaction and ${\nu }_{\text{B}}$ is the stoichiometric number of species B. The ratio $\frac{n}{{\nu }_{\text{B}}}$ is to be taken as positive if the species B is consumed in a cathodic reaction or produced in an anodic reaction. Otherwise it is to be taken as negative. With the convention that the normal distance vector points into the electrolytic solution, a cathodic current is then negative, an anodic current positive.