The ion transport near the interface between electrolyte and ionic exchange polymer membranes (anionic and cationic ones) and charged mosaic polymer composite membrane is studied. The results show that both anionic and cationic polymer exchange membranes exhibit lower voltage drop over range of applied current density and possess favorable industrial application potentials, especially at low KCI concentration. CP and I-Vmeasurements are effectively used to give some fundamental understandign for ion transport behavior of ion exchange polymer membrane near the interface.