Galvani potential

In electrochemistry, the Galvani potential (also called Galvani potential difference, or inner potential difference, Δφ, delta phi) is the electric potential difference between two points in the bulk of two phases.^[1] These phases can be two different solids (e.g., two metals joined), or a solid and a liquid (e.g., a metal electrode submerged in an electrolyte).

The Galvani potential is named after Luigi Galvani.