Butler–Volmer equation

The Butler -Volmer equation (passage current-voltage relationship) describes how a change in electrochemical current change of the electrode potential. This equation forms the basis for the explanation of many phenomena and the interpretation of electrochemical processes. Main fields of application are the electrodeposition of metal or the description of the characteristic of accumulators.

With the following parameters:

This shape applies to reactions in which the speed is controlled by the charge passing through the electrode. In other cases there are similar, most of complex equations. The difference between the electrode and the equilibrium potential is the overvoltage.

The Butler -Volmer equation can be derived from the kinetics. For simplicity, it describes that the rate of ( electrochemical ) reaction exponentially on the " driving force " of the reaction depends.

The now mostly Butler -Volmer equation mentioned relationship was first released in 1930 in a crucial work of chemists Tibor Erdey - Grúz and Max Volmer. John Alfred Valentine Butler published in 1932 a corresponding work, which he had in 1924 already done the work.