Tafelparameter
Tafelparameter, in electrochemistry, refers to the parameters that appear in the Tafel equation describing how the overpotential of an electrode reaction relates to the current density under activation-controlled conditions. The term is commonly used to denote the Tafel slope and the exchange current density, which together characterize the kinetics of an electrode process.
The Tafel equation expresses a linear relationship between overpotential η and the logarithm of current density i
In practice, a Tafel plot (η versus log10 i) yields a straight line in the activation-controlled region.
Limitations include the validity of the activation-control assumption, which may break down at high current densities