Definition of a polarization law
Introduction
A polarization law is a law that connects the difference of electric potential and the current density at the level of an electrochemical interface (electrode/electrolyte).
Polarization law
A polarization law is defined by a series of values: (normal component of the current density Jne / difference ΔV of electric potential)
Current density:
The normal component of the current density at a point ( 
) is considered positive
when the current passes from the electrolyte towards the cathode. The normal unit vector
is directed from
the electrolyte towards the cathode.
Difference of electric potential:
The difference ∆V of the electric potential represents the electric potential of the electrolyte at a point very close to the cathode, when that of the cathode is null:
where:
- Ve is the electric potential of the electrolyte
- Vc is the electric potential of the cathode
Definition of a polarization law
The values of the normal component of the current density Jne must be strictly increasing.
The values of the differences ΔV of the electric potential must be: either strictly increasing, or strictly decreasing.
Modes of definition
You can define a polarization law in two different ways:
- directly: defining the couple of values in a dialog box
- indirectly: defining the couple of values in a text file
The file text must meet the following requirements :
- only two values per line, separated by a space
- no title