$i_l$ is the current density of the electrolyte	A/m2
$\mathrm{F}$ is the Faraday constant	C/mol
${\mathrm{c}}_{\mathrm{i}}$ is the concentration of the electrolyte	mol/m3
${\mathsf{\varphi }}_{\mathrm{l}}$ is the potential of the electrolyte	V
${\mathsf{\sigma }}_{\mathrm{l}}$ is the conductivity of the electrolyte	S/m
μm,i is the ion mobility	m2/(s·J·mol)
${\mathrm{z}}_{\mathrm{i}}$ is the charge carried by the ion